loading sudoku puzzle.

[Pain]

Hello guys. I am building a 'sudoku' game and i want to load a puzzle (which is actually a text string consisting of 81 digits).

 

I have succeeded in loading just one puzzle, however i want to make it possible to load a different puzzle when the user clicks on a button. Also the old puzzle should be removed.

 

Here is my sudoku board:

 

<div class="group">
<div class="cell"><input type="text" name="8_0" onfocus="{onFocusY=8;onFocusZ=0;}"></div>
<div class="cell"><input type="text" name="8_1" onfocus="{onFocusY=8;onFocusZ=1;}"></div>
<div class="cell"><input type="text" name="8_2" onfocus="{onFocusY=8;onFocusZ=2;}"></div>
<div class="cell"><input type="text" name="8_3" onfocus="{onFocusY=8;onFocusZ=3;}"></div>
<div class="cell"><input type="text" name="8_4" onfocus="{onFocusY=8;onFocusZ=4;}"></div>
<div class="cell"><input type="text" name="8_5" onfocus="{onFocusY=8;onFocusZ=5;}"></div>
<div class="cell"><input type="text" name="8_6" onfocus="{onFocusY=8;onFocusZ=6;}"></div>
<div class="cell"><input type="text" name="8_7" onfocus="{onFocusY=8;onFocusZ=7;}"></div>
<div class="cell"><input type="text" name="8_8" onfocus="{onFocusY=8;onFocusZ=8;}"></div>
</div>

    
<textarea id="puzzle">306500090200400851100780060009368500628000349005924100040097002863001005070003408</textarea>

 

Actually there are nine of them, but there's no point in copying them all, they are pretty much the same.

 

To load the puzzle i've used the following javascript:

 

function ReloadingBoard(){
var puzzle = new String(document.getElementById('puzzle').value);
var pos;
var ch;
var cell;
var r;
var c;
            
pos = 0;
for(c=0;c<=8;c++)
{
for(r=0;r<=8;r++)
{
cell = GetCellFromRowcolumn(r,c);     
ch = puzzle.substr(pos,1);
                    
switch(ch){
case '0':
cell.value = '';
break;
default: cell.value = ch;
break;
}
pos++;
}
}
}

 

and

 

function loadingBoard(){
document.onkeyup = KeyPressed; 
ReloadingBoard();
}

 

So how do i make the board load a different puzzle when i click the button? Any ideas? Thanks:)