function change(UlID, ImgID) 
 {
	var ListID = document.getElementById(UlID);
	var ImgSource = document.getElementById(ImgID);
	
	if(ListID.style.display == "block")
		{ 
			ListID.style.display = "none";
			ImgSource.src = "images/plusbox.gif";
		}
	else
		{
			ListID.style.display = "block";
			ImgSource.src = "images/minusbox.gif";
		}
 }