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>