1 function checkall(form, prefix, checkall) {
2 var checkall = checkall ? checkall : 'chkall';
3 for(var i = 0; i < form.elements.length; i++) {
4 var e = form.elements[i];
5 if(e.type=="checkbox"){
6 e.checked = form.elements[checkall].checked;
7 }
8 }
9 }