/**    
 * Declare the images.
 */ 
  
var head="display:''";
closedFolder = new Image();
closedFolder.src = "../images/arrow-closed.gif";
openFolder = new Image();
openFolder.src = "../images/arrow-open.gif";

 
 
   
/**
 * Toggles the tree branch open/closed depending on it's current state.
 * The actual toggle is accomplished by setting the list's style
 * to 'display: none' to hide it or 'display:' to show it.
 */



function toggleTree(header, list){

	//javascript: alert('toggleTree called');

	thisID = document.getElementById(list);
	//alert('this 1: ' + thisID);

	if (thisID.style.display == "none") {	  
		header.src = openFolder.src;
		thisID.style.display = "";
	} else {
		header.src = closedFolder.src;	     
		thisID.style.display = "none";
	}
}