Expand and Collapse the SharePoint Web parts.

1. Click on the Edit page Under "Site Actions".
2.Add Content Editor Web part any Zone.
3.Click on the Web part. "Click here to add content"
4.Click On "Edit Html Source" on the Ribbon.
5.Add following code.


<script type="text/javascript">
// Add the Web Part Titles here to have them opened by default
var wpsToSkip = ['Search Documents','sandbox'];
 //Add multiple Web parts to skip the Collapse
//var wpsToSkip = ['Search Documents','Pending Documents','sandbox'];


function wpExpander() {
 var theTDs = document.getElementsByTagName("TD");
 for (var t=0;t<theTDs.length;t++) {
  var id = theTDs[t].id;
  if (id.match("WebPartTitleWPQ")) {
   id = id.substr(id.indexOf("WPQ"));
   var title = (theTDs[t].innerText || theTDs[t].textContent).replace(/[\n\r]/,'');
   var strImg = "<img style='margin:6px 5px 0px 2px;cursor:hand;float:left;' ";
   if (wpsToSkip.join().match(title)) {
    strImg += "onClick='showHide(\""+id+"\",this)' src='/_layouts/images/minus.gif'>";
   } else {
    strImg += "onClick='showHide(\""+id+"\",this)' src='/_layouts/images/plus.gif'>";
    document.getElementById("WebPart"+id).style.display = "none";
   }
   theTDs[t].innerHTML = strImg + theTDs[t].innerHTML;
  }
 }
}


function showHide(i,o) {
 var wp = document.getElementById("WebPart"+i);
 wp.style.display = (wp.style.display=="") ? "none" : "";
 o.src = (o.src.match(/plus.gif/)) ? "/_layouts/images/minus.gif" : "/_layouts/images/plus.gif";
}


_spBodyOnLoadFunctionNames.push("wpExpander()");
</script>