[Greasemonkey] Xpath Question

[Randy Burke]

I have a scipt I use alot, there is a function to clean all the check boxes
on a pag, there are alot of them and it is very slow.

//clears all checkmarks. clunky but it works...
function runClr(){
    for (I = 0; I < 1199; I++){
        var x = 'B' + I;
        var ckbox=document.getElementById(x);
        if (ckbox){
            if (ckbox.checked === true){
                ticks(x, false);  //function to set or clear checkboxes
            }
        }
    }
}

I was thinking that it might be better to us xpath to trim down the list to
just the check ones

Also is there a was to use wild cards in xpath like @id='b*' or something
like that