全选与改变行背景

<script type="text/javascript">
	function SelectAll(tempControl)
	{
	   var theBox=tempControl;
	   xState=theBox.checked;
	   elem=theBox.form.elements;
	   for(i=0;i<elem.length;i++)
	   {
	     if(elem[i].type=="checkbox" && elem[i].id!=theBox.id)
	     {
	       if(elem[i].checked!=xState)
	       {
	         elem[i].click();
	       }
	     }
	   }
	}
	function changecolor(cbo,o)
	{
	  var theBox=cbo;
	  var tr=document.getElementById(o);
	  if(theBox.checked)
	  {
	    tr.style.backgroundColor="Red";
	  }
	  else
	  {
	    tr.style.backgroundColor="#CCCCCC";
	    
	  }
	}
	</script>