//改變復選框的全選狀態(tài)

 <script languange="javascript">
    function checkAllTarget(target)
    {
     var cks = document.getElementsByName(target);
     var ck = window.event.srcElement;
    
     if(ck.checked==false)
     {
      for(var i=0;i<cks.length;i++)
      {
       if(cks[i].checked == false) cks[i].checked = true;
       cks[i].click();
      }
     }
     else
     {
      for(var i=0;i<cks.length;i++)
      {
       if(cks[i].checked == true) cks[i].checked = false;
       cks[i].click();
      }
     }
    }

</script>