var img1 = new Image();
img1.src = "plus.gif";
var img2 = new Image();
img2.src = "minus.gif";
 
function doOutline() {
var srcId, srcElement, targetElement;
   srcElement = window.event.srcElement;
   if (srcElement.className.toUpperCase() == "LEVEL1" || srcElement.className.toUpperCase() == "FAQ") {
 		 srcID = srcElement.id.substr(0, srcElement.id.length-1);
 		 targetElement = document.all(srcID + "s");
 		 srcElement = document.all(srcID + "i");
 
   	if (targetElement.style.display == "none") {			
 				 targetElement.style.display = "";
 		 		 if (srcElement.className == "LEVEL1") srcElement.src = img2.src;
      	} else {
 				 targetElement.style.display = "none";
 				 if (srcElement.className == "LEVEL1") srcElement.src = img1.src;
      }
   }
 }
 
document.onclick = doOutline;