sharepoint 2010 webpart expand collapse scripts

copy the below code in CEWP (content editor webpart)  any where in the page.

<script type="text/javascript">

  
function WPToggle(thisId, ImageId)
{
if (document.getElementById(thisId).style.display=="none")
{
document.getElementById(thisId).style.display="";
document.getElementById(ImageId).src = "/_layouts/images/minus.gif";
}
else
{
document.getElementById(thisId).style.display="none";
document.getElementById(ImageId).src = "/_layouts/images/plus.gif";
}
}
 
function ExpandCollapseBody()
{
var i = 1;
var WPid = "WebPartWPQ1" ;
var WPtitleid = "MSOZoneCell_WebPartWPQ1" ;
var Toggleid = "ToggleImage1" ;
do
{
try
{
document.getElementById(WPtitleid).innerHTML = '<IMG id="' + Toggleid + '" onClick="WPToggle(\'' + WPid + '\',\'' + Toggleid + '\')" alt="Expand/Collapse" style="margin:6px 5px 0px 2px; float:left; cursor:pointer;" src="/_layouts/images/minus.gif" />' + document.getElementById(WPtitleid).innerHTML ;
if (document.getElementById(WPid).style.display=="none")
{
document.getElementById(Toggleid).src = "/_layouts/images/plus.gif";
}
}
catch(err) {}
i = i + 1;
WPid = "WebPartWPQ" + i ;
WPtitleid = "MSOZoneCell_WebPartWPQ" + i;
Toggleid = "ToggleImage" + i;
} while (document.getElementById(WPid))
}
 
_spBodyOnLoadFunctionNames.push("ExpandCollapseBody()"); </script>