function doOutline() {
  var img1 = new Image();
 img1.src = "plus.gif";
 var img2 = new Image();
 img2.src = "minus.gif";
  var srcId, srcElement, targetElement;
  srcElement = window.event.srcElement;
  if (srcElement.className.toUpperCase() == "LEVEL1") {
		 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;
     }
  }
}