一个多选与删除按钮联动的js

<script language="JavaScript">
<!--
function ChkSelect(form,element){
var EverCheck = false;
if(element.length != null){
for(var i = 0 ;i < element.length;i++){
if(element[i].checked)
EverCheck = true;
}
}
else{
if(element.checked)EverCheck = true;
}
if(EverCheck) form.DelChk.disabled = false;
else{
form.DelChk.disabled = true;
if(form.chkall.checked)
form.chkall.click();
}
}
function CheckAll(form,element){
if(element.length != null){
for (var i=0;i<element.length;i++){
element[i].click();
}
}
else{
element.click();
}
}
//-->
</script>