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<title>Free Online SuDoKu Puzzle Creator and Solver</title>

<meta name="keywords" content="free, online, sudoku, create, play, puzzle, soduko, suduku, sodoko, wordpress"/>
<meta name="description" content="Generate Sudoku Puzzles. Play Sudoku Puzzles online. Free Soduko, suduku and sudoku puzzles"/>

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	//game by benjamin bach
	//license: gpl
	//questions: benjamin___('-@-')___overtag___dot___dk
                //updated by troy cox 05.21.06 http://life.currenttoday.com/

	
	//The reason for all these arrays? To hardcode information so that no on-the-fly calculations are needed within loops.
	
	var arr_sudo_index;			//Array(Array(possible values), index_column, index_row, index_region)
	var arr_sudo_solutions;		//an array containing solutions to each field
	var arr_sudo_input_fields;	//Array of input fields.
	
	var arr_sudo_columns;	//a convenient array of columns Array( columns => Array(index_values))
	var arr_sudo_rows;		//a convenient array of rows Array( rows => Array(index_values))
	var arr_sudo_regions;	//a convenient array of regions Array( regions => Array(index_values))
	
	var arr_sudo_elimated_columns;	//keep track of what numbers that have been eliminated so
	var arr_sudo_elimated_rows;		//we won't have to do that more than necessary
	var arr_sudo_elimated_regions;
	
	var i_sudo_size;			//size of the game
	var i_sudo_field_no;		//total number of fields
	var obj_sudo_placeholder;	//HTML Element with the game board
	
	var bol_sudo_show_info	= true;		//echo information about highlighted field
	var bol_sudo_test_input	= true;		//echo information about highlighted field

	var i_sudo_field_cnt;

	//Create HTML content and the array of values
	function sudo_init(i_size) {
	
		obj_sudo_placeholder = document.getElementById('sudo_gameplate')
		i_sudo_size		= i_size;	//Set global size of board
		i_sudo_field_no	= Math.pow(i_sudo_size, 4);
		arr_sudo_solutions		= sudo_init_solution_array();
		sudo_init_html();
		sudo_init_arrays();

		//Write solutions for each field that has input.value
		sudo_reset_solutions();
		
	}
	
	//Initialize all the arrays (except the solutions array)
	function sudo_init_arrays() {
	
		//Initialize global arrays
		arr_sudo_index				= new Array();
		arr_sudo_columns			= new Array();
		arr_sudo_rows				= new Array();
		arr_sudo_regions			= new Array();
		
		//Create the array for all fields in the game board
		for (i = 0; i < i_sudo_field_no; i++) {
			
			column_index = i % (i_sudo_size * i_sudo_size);
			row_index = Math.floor( i / (i_sudo_size * i_sudo_size) );
			region_index = (Math.floor(row_index / i_sudo_size)) * i_sudo_size + Math.floor(column_index / i_sudo_size);
			
			//[1] => Column membership
			//[2] => Row membership
			//[3] => Region membership
			arr_sudo_index[i] = Array(column_index, row_index, region_index);
			
			//Create sub-arrays if they don't exist!
			
			if (typeof(arr_sudo_columns[column_index])	!= 'object') arr_sudo_columns[column_index]	= new Array();
			if (typeof(arr_sudo_rows[row_index])		!= 'object') arr_sudo_rows[row_index]		= new Array();
			if (typeof(arr_sudo_regions[region_index])	!= 'object') arr_sudo_regions[region_index]	= new Array();
			
			arr_sudo_columns[column_index][arr_sudo_columns[column_index].length]	= i;
			arr_sudo_rows[row_index][arr_sudo_rows[row_index].length]				= i;
			arr_sudo_regions[region_index][arr_sudo_regions[region_index].length]	= i;
		}
		
	
	}
	
	function sudo_init_html() {
		
		//Write the HTML data of the game
		str_html = '<form><table cellpadding="0" cellspacing="0" class="sudotable" border="0"><form id="sudo_form">';
		for (i = 0; i < i_sudo_size * i_sudo_size; i++) {
						
			if (i > 0 && i % i_sudo_size == 0) {
				str_html += '<tr><td colspan="' + (i_sudo_size * i_sudo_size + i_sudo_size - 1) + '" class="hsep"></td></tr>'
			}
			
			str_html += '<tr>';
			for (row = 0; row < i_sudo_size * i_sudo_size; row++) {
				
				if (row > 0 && row % i_sudo_size == 0) {
					str_html += '<td class="vsep"></td>'
				}
				
				//The index of the field
				i_field_index = i * i_sudo_size * i_sudo_size + row;
				str_html +=	'<td><input type="text" class="sudo_field"' +
							' onkeydown="old_val = this.value"' +
							' onkeyup="sudo_input_change(true, ' + i_field_index + ', this.value)"' +
							' onfocus="sudo_field_hightlight(' + i_field_index + ')"' +
							' onblur="sudo_field_blur(' + i_field_index + ')"' +
							' /></td>';
			}
			str_html += '</tr>';
		}
		str_html += '</table></form>';

		//Put the HTML in the placeholder
		obj_sudo_placeholder.innerHTML = str_html;
		
		//Find the input fields...
		arr_sudo_input_fields = obj_sudo_placeholder.getElementsByTagName('input');

	}
	
	function sudo_init_solution_array() {
		var arr_fields = new Array(i_sudo_field_no);
		//Write down ALL possible solutions
		for (var i = 0; i < i_sudo_field_no; i++) {
			var arr_solutions = new Array();
			for (a = 0; a < i_sudo_size * i_sudo_size; a++) {
				arr_solutions[a] = a;
			}
			//[0] => Solutions possible
			//[1] => Has been eliminated = false
			arr_fields[i] = [arr_solutions, false];
		}
		return arr_fields;
	}
	
	//Create a new game.
	//int_max_fields = maximum moves to solve the game (0-100 value)
	
	//The theory of this function:
	//Place a number. Then eliminate as much as possible.
	//Place a new number from the solution arrays.
	//Continue a number of times.
	//After a certain amount of numbers placed, start figuring out how many
	//moves it takes to solve the game. If it suddenly can't be solved, then start all over.
	//Otherwise stop when the number of moves has been reached and the game is solveable.
	function sudo_create(i_filled_fields_fac) {
	
		if (i_sudo_size > 3 && !confirm('You will need a 10 GHz Pentium 12 or a lot of luck with random numbers to succeed this. We are very sorry, but this version of SuDoKu has a way too slow algorithm to create games of this size.\n\nReally continue?')) {
			return;
		}
	
		setTimeout('sudo_create_do(' + i_filled_fields_fac + ')', 100);
	
	}
	
	function sudo_create_do(i_filled_fields_fac) {
		
		var bol_game_solvable = false;
		var i_filled_fields			= Math.pow(i_sudo_size, 3) + Math.round(i_sudo_size * i_filled_fields_fac / 10);
		var i_min_filled_fields	= 1; //Minimum number of moves before we start eliminating fields.
		
		while (!bol_game_solvable) {
		
			sudo_init_arrays();
		
			arr_sudo_solutions		= sudo_init_solution_array();
			var i_cnt				= 0;
			var arr_empty_fields	= new Array(i_sudo_field_no); //Keep track of empty fields
			var arr_filled_fields	= new Array();
			
			for (i = 0, i_length = arr_empty_fields.length; i < i_length; i++) arr_empty_fields[i] = i; //Insert field numbers.
			
			while (
				i_cnt < i_min_filled_fields && sudo_eliminate(true)
			) {
			
				//Find a random field in the array with empty fields
				i_rnd_field_index = sudo_random(0, arr_empty_fields.length);
				
				//Put a random number from the solutions array in the empty field
				i_field_index 				= arr_empty_fields[i_rnd_field_index];
				i_rnd_number_solu_index		= sudo_random(0, arr_sudo_solutions[i_field_index][0].length - 1);
				i_rnd_number_put_in_field	= arr_sudo_solutions[i_field_index][0][i_rnd_number_solu_index];
			
				arr_sudo_solutions[i_field_index][0] = [i_rnd_number_put_in_field];
				arr_filled_fields[arr_filled_fields.length] = i_field_index;
			
				//Remove this field from the empty fields array
				arr_empty_fields = sudo_array_delete(arr_empty_fields, i_rnd_field_index);
				
				//Remove the number from corresponding rows/columns/regions
				sudo_eliminate_solution(i_field_index, i_rnd_number_put_in_field, true);
			
				i_cnt++;
				
				if (i_cnt == i_min_filled_fields && !(bol_game_solvable = sudo_solve(true, true))) i_min_filled_fields++;
				
			}
		}
		//Do it all again if the game couldn't be solved...
		var arr_filled_fields_new = arr_filled_fields;
		var i_filled_cnt = 0;
		var bol_donttesttherest = false;
		
		for (var i = 0, i_length = arr_filled_fields.length; i < i_length; i++) {
			if (arr_filled_fields_new.length <= i_filled_fields) {
				bol_donttesttherest = true;
			}
			//Store the old solutions array
			var arr_old = arr_sudo_solutions;
			//Store the old filled fields and try out one without this member.
			var arr_filled_fields_old = arr_filled_fields_new;
			if (!bol_donttesttherest) {
				arr_filled_fields_new = sudo_array_delete_value(arr_filled_fields_new, arr_filled_fields[i]);
				arr_sudo_solutions = sudo_init_solution_array();
				for (var a = 0, a_length = arr_filled_fields_new.length; a < a_length; a++) {
						arr_sudo_solutions[arr_filled_fields_new[a]][0] = arr_old[arr_filled_fields_new[a]][0];
						sudo_eliminate_solution(arr_filled_fields_new[a], arr_old[arr_filled_fields_new[a]][0][0], true);
				}
			}
			//If the new solutions array can't be solved we'll rollback to the old arrays
			//And fill the field
			if (bol_donttesttherest || !sudo_solve(true)) {
				arr_sudo_solutions = arr_old;
				arr_filled_fields_new = arr_filled_fields_old;
				arr_sudo_input_fields[arr_filled_fields[i]].value = sudo_translate_input(arr_sudo_solutions[arr_filled_fields[i]][0][0], true);
				arr_sudo_input_fields[arr_filled_fields[i]].disabled = true;
				arr_sudo_input_fields[arr_filled_fields[i]].style.color = '#000';

			}
		}
		arr_sudo_solutions = sudo_init_solution_array();
		sudo_eliminate_human(true);
		sudo_status('Ready!');
	}
	
	function sudo_array_delete(arr_perfom_in, i_member) {
	
		var arr_return = new Array();
		for (i = 0, i_length = arr_perfom_in.length; i < i_length; i++) {
			if (i != i_member) arr_return[arr_return.length] = arr_perfom_in[i];
		}
		return arr_return;
	
	}
	
	function sudo_array_delete_value(arr_perfom_in, i_value) {
	
		var arr_return = new Array();
		for (i = 0, i_length = arr_perfom_in.length; i < i_length; i++) {
			if (arr_perfom_in[i] != i_value) arr_return[arr_return.length] = arr_perfom_in[i];
		}
		return arr_return;
	
	}
	
	//Return some random number
	function sudo_random(i_from, i_to) {
		return Math.floor(Math.random() * (i_from - i_to + 1) + i_to);
	}
	
	//Write solutions array when game is created or input is changed
	function sudo_reset_solutions() {
		
		if (arguments.length == 0) {
			for (i = 0; i < i_sudo_field_no; i++) {
				i_input_val = arr_sudo_input_fields[i].value;
				if (i_input_val != '') {
					arr_sudo_solutions[i][0] = [sudo_translate_input(i_input_val, false)];
				}
			}
		} else {
			i_input_val = arr_sudo_input_fields[arguments[0]].value;
			if (i_input_val != '') {
				arr_sudo_solutions[arguments[0]][0] = [sudo_translate_input(i_input_val, false)];
			}
		}
	
	}
	
	
	//Solve af game or merely check if it can be solved..
	//bol_quiet = simply return true/false and don't echo anything to the user!
	//bol_skip_elimination = true if we don't have to eliminate first
	function sudo_solve(bol_quiet, bol_skip_elimination) {
	
		if (!bol_quiet && isNaN(i_sudo_size)) {
			sudo_status('No game to solve.');
			return;
		}
	
		//Eliminate solutions
		//Returns false if any field has no solutions
		bol_sudo_solved = (bol_skip_elimination || sudo_eliminate(bol_quiet));
		
		//Check that only 1 solution is left in ALL fields.
		for (i = 0; i < i_sudo_field_no && bol_sudo_solved; i++) {
			if (arr_sudo_solutions[i][0].length != 1) {
				bol_sudo_solved = false;
			} else if (!bol_quiet) {
				arr_sudo_input_fields[i].value = sudo_translate_input(arr_sudo_solutions[i][0], true);
			}
		}
		
		if (!bol_sudo_solved && !bol_quiet) {
			alert('No solution found.');
		} else if (!bol_quiet) {
			sudo_status('Game solved.');
		}
		
		return bol_sudo_solved;
	
	}
	
	function sudo_test() {
	
		if (isNaN(i_sudo_size)) {
			sudo_status('No game to test.');
			return;
		}
	
		var bol_solvable = sudo_eliminate(true);
	
		if (bol_solvable && sudo_solve(true)) {
			alert('A solution is possible.');
		} else if (bol_solvable) {
			alert('Multiple solutions found. The game cannot be solved.');
		} else {
			alert('No solutions found.');
		}
		
		//Return to human solving...
		sudo_eliminate_human(true, 0, 0);
	
	}
	
	//Eliminate solutions
	//Returns false if a field looses all of its solutions.
	//bol_quiet = false: solutions are written in input fields when found.
	function sudo_eliminate(bol_quiet) {

		//Start the elimination process
		//These recursive calls will return false if
		//no solutions are found
		return	sudo_eliminate_do(arr_sudo_columns, bol_quiet) &&
				sudo_eliminate_do(arr_sudo_rows, bol_quiet) &&
				sudo_eliminate_do(arr_sudo_regions, bol_quiet);
		
	}
	
	//Eliminate solutions recursively
	function sudo_eliminate_do(arr_perform_in, bol_quiet) {
		
		//Eliminate anything in the columns. start over if something is eliminated!
		for (i = 0, i_length = arr_perform_in.length; i < i_length; i++) {
			
			//Array for the first occurence of a solution
			var arr_solutions_first_occur = new Array(i_sudo_size * i_sudo_size);
			//Create an array of solutions so that we may count
			//the number of occurences. Give all members initiate value of 0.
			var arr_count = new Array(i_sudo_size * i_sudo_size);
			for (a = 0, a_length = arr_count.length; a < a_length; a++) arr_count[a] = 0;
			
			var arr_perform_in_i = arr_perform_in[i];
			
			//Go through members of the column
			for (a = 0, a_length = arr_perform_in_i.length; a < a_length; a++) {
				
				var arr_perform_in_i_a = arr_perform_in_i[a];
				
				//If the field only has 1 solution, it must be eliminated if it hasn't been already
				if (!arr_sudo_solutions[arr_perform_in_i_a][1] && arr_sudo_solutions[arr_perform_in_i_a][0].length == 1) {
					sudo_eliminate_solution(arr_perform_in_i_a, arr_sudo_solutions[arr_perform_in_i_a][0][0], bol_quiet);
					return sudo_eliminate_do(arr_perform_in, bol_quiet);
				}
				
				//Go through the solutions and increment the member of the solution array
				for (b = 0, b_length = arr_sudo_solutions[arr_perform_in_i_a][0].length; b < b_length; b++) {
					i_this_solution = arr_sudo_solutions[arr_perform_in_i_a][0][b];
					arr_count[i_this_solution]++;
					//If it's the first occurence we'll index it!
					if (arr_count[i_this_solution] == 1) arr_solutions_first_occur[i_this_solution] = arr_perform_in_i_a;
				}
			}
			//Go through solutions found
			for (a = 0, a_length = arr_count.length; a < a_length; a++) {
				if (arr_count[a] == 0) {
					//Oh horror, there's no fields with this particular number in it's solution array
					return false;
				} else if (arr_count[a] == 1 && !arr_sudo_solutions[arr_solutions_first_occur[a]][1]) {
					//Call function that eliminates occurences in the same column
					sudo_eliminate_solution(arr_solutions_first_occur[a], a, bol_quiet);
					return sudo_eliminate_do(arr_perform_in, bol_quiet);
				} else {
					//Nothing eliminated and so what?
				}
			}
		}
		
		return true;

	}
	
	//Remove a solution from row/column/region
	function sudo_eliminate_solution(i_elim_index, i_number_to_remove, bol_quiet) {

		arr_sudo_solutions[i_elim_index][0]	= [i_number_to_remove];
		arr_sudo_solutions[i_elim_index][1]	= true;
		
		!bol_quiet ? arr_sudo_input_fields[i_elim_index].value = sudo_translate_input(i_number_to_remove, true) : false;
		
		//Call the function that performs the actual removal in the parent
		//columns, rows and regions
		sudo_eliminate_solution_do(i_elim_index, i_number_to_remove, arr_sudo_columns[arr_sudo_index[i_elim_index][0]], arr_sudo_solutions);
		sudo_eliminate_solution_do(i_elim_index, i_number_to_remove, arr_sudo_rows[arr_sudo_index[i_elim_index][1]], arr_sudo_solutions);
		sudo_eliminate_solution_do(i_elim_index, i_number_to_remove, arr_sudo_regions[arr_sudo_index[i_elim_index][2]], arr_sudo_solutions);
	
	}
	
	//Remove a solution from row/column/region
	// - perform the actual elimination
	function sudo_eliminate_solution_do(i_elim_index, i_number_to_remove, arr_perform_in) {
		
		//Eliminate from columns
		for (i = 0, i_length = arr_perform_in.length; i < i_length; i++) {
		
			i_index = arr_perform_in[i];
		
			//Perform elimination on any field but this
			if (i_index != i_elim_index) {
				//Create a new array that holds all solutions but this
				arr_new_array = new Array();
				for (a = 0, a_length = arr_sudo_solutions[i_index][0].length; a < a_length; a++) {
					var i_this_solution = arr_sudo_solutions[i_index][0][a];
					i_this_solution != i_number_to_remove ? arr_new_array[arr_new_array.length] = i_this_solution : false;
				}
				arr_sudo_solutions[i_index][0] = arr_new_array;
			}
		}
	}

	//Stupid human elimination. Only eliminates what's typed
	//in the input fields. Used for displaying field info
	function sudo_eliminate_human(bol_start_over, i_index, i_value) {

		//If input is changed we need the reset all solutions and start over.
		if (bol_start_over) {
			arr_sudo_solutions = sudo_init_solution_array();
			sudo_reset_solutions();
			for (j = 0, j_length = i_sudo_field_no; j < j_length; j++) {
				if (arr_sudo_solutions[j][0].length == 1) {
					sudo_eliminate_solution(j, arr_sudo_solutions[j][0][0], true);
				}
			}
		//Otherwise just eliminate this number
		} else {
			sudo_eliminate_solution(i_index, i_value, true);
		}
		
	}
	
	function sudo_input_change(bol_start_over, i_index, i_value) {
	
		if (sudo_validate_input(i_value) || i_value == '') {
			sudo_eliminate_human(bol_start_over, i_index, sudo_translate_input(i_value, false));
			sudo_update_field_info(i_index);
			if (i_value != '') {
				sudo_test_input(i_index);
			}
		} else if (i_value != '') {
			arr_sudo_input_fields[i_index].value = old_val;
		}
		
		i_sudo_field_cnt = 0;
		for (i = 0; i < i_sudo_field_no; i++) {
			if (arr_sudo_input_fields[i].value != '') {
				i_sudo_field_cnt++;
			}
		}

		//If all fields have been filled then test the game
		if (i_sudo_field_cnt == i_sudo_field_no && sudo_solve(true)) {
			sudo_status('Game solved correctly.');
		} else if (i_sudo_field_cnt == i_sudo_field_no) {
			sudo_status('Incorrect solution.');
		}
	
	}
	
	function sudo_test_input(i_index) {
	
		if (bol_sudo_test_input) {
			if (sudo_solve(true)) {
				arr_sudo_input_fields[i_index].style.backgroundColor = '#0e0';
				sudo_status('Input is okay; The game can be solved.');
			} else {
				arr_sudo_input_fields[i_index].style.backgroundColor = '#f99';
				sudo_status('Incorrect input; The game cannot be solved.');
			}
		}
	}
	
	function sudo_toggle_test_input(bol_test) {
		bol_sudo_test_input = bol_test;
		if (!bol_sudo_test_input) sudo_status('Ready');
	}
	
	//Function to use in order to output or input numbers ([1-9]) or letters ([0-9A-G])
	//false = human -> zero-indexed; true = zero-indexed -> human
	arr_sudo_number_to_char = new Array(1,2,3,4,5,6,7,8,9,'A','B','C','D','E','F', 'G')
	arr_sudo_char_to_number = new Array(arr_sudo_number_to_char.length);
	for (i = 0; i < arr_sudo_number_to_char.length; i++) {
		arr_sudo_char_to_number[arr_sudo_number_to_char[i].toString()] = i;
	}
	function sudo_translate_input(mixed_input, bol_in_out) {
		
		//Translate from input
		if (bol_in_out) {
			return arr_sudo_number_to_char[mixed_input];
		} else {
			return arr_sudo_char_to_number[mixed_input.toString()];
		}
	
	}
	
	//Validate silly human input
	function sudo_validate_input(s_input) {
		for (i = 0, i_length = i_sudo_size * i_sudo_size; i < i_length; i++) {
			if (s_input == arr_sudo_number_to_char[i]) return true;
		}
		return false;
	}
	
	//Return aan array containing all the fellow memberships of a given
	//field - meaning all other fields that also belong to the same
	//row/region/column
	function sudo_field_fellows(i_index) {
		return arr_sudo_columns[arr_sudo_index[i_index][0]].concat(arr_sudo_rows[arr_sudo_index[i_index][1]], arr_sudo_regions[arr_sudo_index[i_index][2]]);
	}
	
	//Hightlight co-member rows, columns and regions
	function sudo_field_hightlight(i_index) {
	
		arr_member_of = sudo_field_fellows(i_index);

		//Highlight columns
		for (i = 0; i < arr_member_of.length; i++) {
			if (arr_member_of[i] != i_index) arr_sudo_input_fields[arr_member_of[i]].style.backgroundColor = '#eee';
		}
		
		//Especially the selected field...
		arr_sudo_input_fields[i_index].style.backgroundColor = '#999';
		
		sudo_update_field_info(i_index);
	
	}
	
	//Hightlight co-member rows, columns and regions
	function sudo_field_blur(i_index) {
	
		arr_member_of = sudo_field_fellows(i_index);

		//Blur columns
		for (i = 0; i < arr_member_of.length; i++) {
			arr_sudo_input_fields[arr_member_of[i]].style.backgroundColor = '#fff';
		}
		sudo_update_field_info(-1);
		
	}
	
	//Show field info
	function sudo_update_field_info(i_index) {
		
		var str_html = '<b>Possible Solutions:</b><br /><br />';
		
		sudo_eliminate_human(true, i_index, true);
		
		if (i_index > -1) {
			this_solution = arr_sudo_solutions[i_index][0];
			for (i = 0, i_length = this_solution.length; i < i_length; i++) {
				str_html += '<input type="text" class="sudo_field" value="' + sudo_translate_input(this_solution[i], true) + '" style="margin-bottom: 4px;" /> ';
			}
		}
		document.getElementById('sudo_field_info').innerHTML = str_html;
		
	}
	
	function sudo_toggle_field_info(bol_show) {
	
		bol_sudo_show_info = bol_show;
	
		if (bol_show) {
			sudo_eliminate_human(true);
			document.getElementById('sudo_field_info').style.visibility = 'visible';
		} else {
			document.getElementById('sudo_field_info').style.visibility = 'hidden';
		}
	
	}
	
	//Make everything hidden and copy the game board to a visible layer
	//Transfer all values of the old board to the copied board
	function sudo_print(obj_to_print) {
	
		if (isNaN(i_sudo_size)) {
			sudo_status('No game to print.');
			return;
		}

		var obj_noprint = document.getElementById('sudo_noprint');
		var obj_body = document.getElementsByTagName('body');

		obj_noprint.style.display = 'none';
		obj_temp_print = document.createElement('div');
		obj_temp_print.innerHTML = obj_to_print.innerHTML;
		
		//Copy values from old board to the printed board
		var obj_old_plate = obj_temp_print.getElementsByTagName('input');
		for (i = 0; i < obj_old_plate.length; i++) {
			obj_old_plate[i].value = arr_sudo_input_fields[i].value;
		}
		
		obj_temp_print.style.display = 'block';
		obj_body[0].appendChild(obj_temp_print);
		window.print();
		obj_body[0].removeChild(obj_temp_print);
		obj_noprint.style.display = 'block';
	
	}

	var i_sudo_timer_id = 0;
	var i_sudo_second_count = 0;
	var obj_sudo_timer_form;
	function sudo_timer(i_command) {
		
		obj_sudo_timer_form = document.sudo_clock;
		
		//Whatever we do, the timer needs to be stopped
		clearTimeout(i_sudo_timer_id);
		
		switch (parseInt(i_command)) {
		
			case 0:
				i_sudo_second_count = parseInt(obj_sudo_timer_form.hh.value * 3600) + parseInt(obj_sudo_timer_form.mm.value * 60) + parseInt(obj_sudo_timer_form.ss.value);
				sudo_timer_do();
				break;
			case 1:
				break;
			case 2:
				i_sudo_second_count = 0;
				sudo_timer_do();
				break;
		}
		
	}

	function sudo_timer_do() {
	
		var i_hh = Math.floor(i_sudo_second_count / 3600);
		var i_mm = Math.floor((i_sudo_second_count % 3600) / 60);
		var i_ss = i_sudo_second_count - i_hh * 3600 - i_mm * 60;
		
		obj_sudo_timer_form.hh.value = sudo_format_number(i_hh);
		obj_sudo_timer_form.mm.value = sudo_format_number(i_mm);
		obj_sudo_timer_form.ss.value = sudo_format_number(i_ss);
		
		i_sudo_second_count++;
		i_sudo_timer_id = setTimeout('sudo_timer_do()', 1000);
	
	}

	function sudo_format_number(i_no) {
		if (i_no < 10) {
			return '0' + i_no;
		} else {
			return i_no;
		}
	}

	function sudo_save_game() {
		
		if (isNaN(i_sudo_size)) {
			sudo_status('No game to save.');
			return;
		}
	
		var str_xml = '<sudoku>\n';
		
		str_xml += '\t<size>' + i_sudo_size + '</size>\n';
		
		for (i = 0; i < i_sudo_field_no; i++) {
			if (arr_sudo_input_fields[i].value != '') {
				str_xml += '\t<field>\n';
				str_xml += '\t\t<index>' + i + '</index>\n';
				str_xml += '\t\t<value>' + arr_sudo_input_fields[i].value + '</value>\n';
				str_xml += '\t</field>\n';
			}
		}
		
		str_xml += '</sudoku>';
		
		document.sudo_save.savetxt.value = str_xml;
		
		sudo_toggle_layers('sudo_blur', 'sudo_save');
	
	}

	function sudo_load_game_do(str_xml) {
	
		try {
			//Instead of using some XML parser we just use regular expressions
			str_xml = str_xml.replace(/[\n\t]/g, "");
			
			i_size = str_xml.match(/<size>(.*)<\/size>/)[1];
			sudo_init(parseInt(i_size));


			if (str_xml.search(/<field>(.*?)<\/field>/) > -1) {
				var arr_fields = str_xml.match(/<field>(.*?)<\/field>/g);
				for (i = 0; i < arr_fields.length; i++) {
					var i_index = arr_fields[i].match(/<index>(.*)<\/index>/)[1];
					var s_value = arr_fields[i].match(/<value>(.*)<\/value>/)[1];
					if (parseInt(i_index) < i_sudo_field_no) arr_sudo_input_fields[i_index].value = s_value;
				}
			}
		
			sudo_reset_solutions();
			//Do human elimination for field info..
			sudo_eliminate_human(true, 0, 0);
		
		} catch(e) {
			sudo_status('Error in Load Game data.');
		}
	
	}
	
	function sudo_status(str_mesg) {
		document.getElementById('sudo_status').innerHTML = str_mesg;
	}
	
	function sudo_toggle_layers() {
	
		for (i = 0, i_length = arguments.length; i < i_length; i++) {
			obj_layer = document.getElementById(arguments[i]);
			 if (obj_layer.style.display == 'block') {
			 	obj_layer.style.display = 'none';
			 	var s_msie = 'visible';
			 } else {
			 	obj_layer.style.display = 'block';
			 	var s_msie = 'hidden';
			 }
		}
	
		if (navigator.userAgent.indexOf('MSIE') > -1) {
			obj_selects = document.getElementsByTagName('select');
			for(i = 0; i < obj_selects.length; i++) {
				obj_selects[i].style.visibility = s_msie;
			}
		}
	}
	
	window.onload = function() {sudo_init(3)};

</script>

<style type="text/css">

	body
	{
		color: #000;
                                font-size: 7pt;
		font-family: sans-serif;
		margin: 1px;
		height: 5%;
	}

	a.sudo_link {
		color: #000;
	}

	table.sudotable td
	{
		padding: 1px;
                                color: #000;
	}
	
	table.sudotable td.vsep
	{
		padding: 0;
		width: 1px;
		background: #000;
                                color: #000;  
	}

	table.sudotable td.hsep
	{
		padding: 0;
		height: 1px;
		background: #000;
                                color: #000;  
	}
	
	
	input.sudo_field
	{
		padding: 1px;
		width: 17px;
		height: 17px;
		font-size: 12px;
		text-align: center;
		border: 1px solid #000;
		color: #000;
		background: #fff;
	}
	
	input.sudo_doprint
	{
		padding: 1px;
		width: 17px;
		height: 17px;
		font-size: 12px;
		text-align: center;
		border: 1px solid #000;
		color: #000;
		background: #fff;
	}
	
	input.sudo_form, select.sudo_form {
		width: 100%;
                                color: #000;
	}
	
	td.sudo_header
	{
		background: #000;
		color: #fff;
		font-size: 7pt;
		font-weight: bold;
		font-family: sans-serif;
		border-width: 1px;
		border-style: outset;
		border-color: #000;
	}

	td.sudo_ad
	{
		background: #ff0;
		color: #000;
		font-size: 7pt;
		font-weight: bold;
		font-family: sans-serif;
		border-width: 1px;
		border-style: outset;
		border-color: #000;
	}
	
	div.sudo_button {
		cursor: pointer;
		padding: 1px 0 1px 2px;
		background: #eef;
		border-width: 1px;
		border-style: outset;
		border-color: #009;
		margin-top: 1px;
	}
	
	div.sudo_button:hover {
		border-style: inset;
	}
	
</style>

</head>

<body>

<div id="sudo_noprint">

<table cellspacing="0" cellpadding="2" class="sudo_noprint">

	<tr style="height: 1px;">
<!--
<td rowspan="7">
<a href="http://www.gamehouse.com/?AID=5770"><img src="images/gamehouse.jpg" width="120" height="600" alt="Play Games at GameHouse.com" /></a>
</td>
-->
		<td class="sudo_header" style="width: 120px;">Controls</td>
		<td class="sudo_header"><a target="_top" href="http://life.currenttoday.com/2006/05/20/sudoku-code-in-wordpress-play-create-sudoku-online-in-your-post/"><font color="#FFFFFF">Free Online Sudoku Code</font></a></td>
		<td class="sudo_header" style="width: 120px;">Field Info</td>
	</tr>

	<tr style="height: 1px;">
		<td valign="top" style="width: 110px; padding-bottom: 8px;">
			<form name="sudo_controls" style="margin: 5px 0;">
			<select name="sudosize" class="sudo_form">
				<option value="2">Size: 4x4</option>
				<option value="3" selected>Size: 9x9</option>
<!--				<option value="4">Size: 16x16</option> -->
			</select>
			<select name="sudolevel" class="sudo_form">
				<option value="-10">Level: High</option>
				<option value="10">Level: Medium</option>
				<option value="14" selected>Level: Low</option>
				<option value="20">Level: Flat</option>
				<option value="60">Level: Retarded</option>
			</select>
			</form>
			<div class="sudo_button" onclick="sudo_status('Please Wait...'); sudo_init(parseInt(document.sudo_controls.sudosize.value)); sudo_create(parseInt(document.sudo_controls.sudolevel.value))">Create Game</div>
			<div class="sudo_button" onclick="sudo_init(parseInt(document.sudo_controls.sudosize.value)); sudo_status('Ready!');">Blank Game</div>
			<div class="sudo_button" onclick="sudo_test();">Test Input</div>
			<div class="sudo_button" onclick="sudo_solve(false);">Solve Game</div>
			<div class="sudo_button" onclick="sudo_save_game()">Save Data</div>
			<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_load');">Load Data</div>
			<div class="sudo_button" onclick="sudo_print(document.getElementById('sudo_gameplate'));">Print Game</div>
			<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_help');">Introduction</div>
		</td>
		<td valign="top" rowspan="4" style="padding: 1px;" class="sudo_doprint" color="000">
			<div id="sudo_gameplate"></div>
		</td>
		<td valign="top" rowspan="4" style="padding-top: 1px; width: 110px;">
			<div id="sudo_field_info"></div>
		</td>
	</tr>

	<tr style="height: 1px;" style="width: 110px;">
		<td class="sudo_header">Options</td>
	</tr>

	<tr>
		<td valign="top" style="width: 110px;">
			<form>
				<input type="checkbox" checked="true" onclick="sudo_toggle_field_info(this.checked)" />Show field info
				<br />
				<input type="checkbox" style="display: block; float: left;" onclick="sudo_toggle_test_input(this.checked)" checked="true" />Automatically test my input
</td>
</tr>
</form>
		<tr style="height: 1px;">
		<td class="sudo_header" style="width: 110px;">Timer</td>
	</tr>
	
	<tr style="height: 1px;">
		<td valign="top" style="width: 110px;" align="center">
		<form name="sudo_clock">
			<input type="text" class="sudo_field" name="hh" value="00" />
			:
			<input type="text" class="sudo_field" name="mm" value="00" />
			:
			<input type="text" class="sudo_field" name="ss" value="00" />
			<div style="font-size: xx-small; margin-top: 1px;">
				<a href="javascript:void(sudo_timer(0));" class="sudo_link">[start]</a>
				<a href="javascript:void(sudo_timer(1));" class="sudo_link">[stop]</a>
				<a href="javascript:void(sudo_timer(2));" class="sudo_link">[reset]</a>
			</div></td>
<td>
</td>
</tr>
		</form>
	<tr>
		<td class="sudo_ad" colspan="1" align="right">
		<div><a target="_top" href="http://life.currenttoday.com/2006/05/20/sudoku-code-in-wordpress-play-create-sudoku-online-in-your-post/">PUT THIS ON YOUR SITE</a></div>
		</td>
		<td class="sudo_header" colspan="2" align="right">
		<div id="sudo_status"><br /></div>
		</td>
	</tr>
<tr>
<td colspan="3" align="center">
<a href="https://my.bigfishgames.com/index.html?afcode=af593c5d4201" target="_new">
<img src="http://www.mygamespace.com/images/banners/mbfgads_468x60.jpg" alt="mbfgads_468x60" border="0"></a>
</td></tr></table>


</div>

<div id="sudo_blur" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: none;">

	<div style="position: absolute; top: 0; left: 0; background: #eee; opacity: .85; filter: alpha(opacity=85); width: 100%; height: 100%;"></div>

</div>

<div id="sudo_help" style="display: none; position: absolute; top: 50px; left: 50px; background: #fff; border: 1px solid #000; padding: 10px; width: 400px;">

	<h2>Introduction to Online SuDoKu</h2>
	These words are taken from <a href="http://en.wikipedia.org/wiki/Sudoku" target="blank;">this</a> Wikipedia page.<br /><br />
	
	The puzzle is most frequently a 9x9 grid made up of 3x3 subgrids (called "regions").
	Some cells already contain numbers, known as "givens". The goal is to fill in the empty cells,
	one number in each, so that each column, row, and region contains the numbers 1-9 exactly once.
	Each number in the solution therefore occurs only once in each of three "directions", hence the
	"single numbers" implied by the puzzle's name.
	<br /><br />
	<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_help');" style="width: 120px; float: right;">Close</div>
</div>

<div id="sudo_save" style="display: none; position: absolute; top: 50px; left: 50px; background: #fff; border: 1px solid #000; padding: 10px; width: 400px;">
	<h2>Save Game</h2>
	To save your game please store this text somewhere. You can later load it back in using the "Load Data" button.
	<br /><br />
	<form name="sudo_save">
		<textarea style="width: 100%; height: 230px" name="savetxt"></textarea>
	</form>
	<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_save');" style="width: 120px; float: right;">Close</div>
</div>

<div id="sudo_load" style="display: none; position: absolute; top: 50px; left: 50px; background: #fff; border: 1px solid #000; padding: 10px; width: 400px;">
	<h2>Load Game</h2>
	To load your game please paste in text saved from the "Save Data" dialogue.
	<br /><br />
	<form name="sudo_load">
		<textarea style="width: 100%; height: 230px" name="loadtxt"></textarea>
	</form>
	<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_load'); sudo_load_game_do(document.sudo_load.loadtxt.value);" style="width: 120px; float: right; margin-left: 4px;">Load Game</div>
	<div class="sudo_button" onclick="sudo_toggle_layers('sudo_blur', 'sudo_load');" style="width: 60px; float: right;">Close</div>
</div>

</body>
</html>