function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function prepareShowImage()
{
	if (!document.getElementsByTagName) return false;
	var lis = document.getElementsByTagName("li");
	for (var i=0; i < lis.length; i++) {
		var li_id = lis[i].getAttribute("id");
		if (li_id == 'SCampus' || li_id == 'WCampus' || li_id == 'MCampus' || li_id == 'CCampus') {
			a = lis[i].childNodes[0];
			if (a.nodeName.toLowerCase() == 'a' && a.childNodes[0].nodeName.toLowerCase() == 'img')
			{
				a.onmouseover = function() {
					var theImg = this.childNodes[0];
					var currentSrc = theImg.getAttribute("src");
					var tempArray = currentSrc.split("/");
					var arrayPointer = (tempArray.length - 1);
					theImg.setAttribute("src", 'http://www.missouristate.edu/images/CampusMap/' + tempArray[arrayPointer].substring(0, 1) + 'Blue.jpg');
				}
				a.onmouseout = function() {
					var theImg = this.childNodes[0];
					var currentSrc = theImg.getAttribute("src");
					var tempArray = currentSrc.split("/");
					var arrayPointer = (tempArray.length - 1);
					theImg.setAttribute("src", 'http://www.missouristate.edu/images/CampusMap/' + tempArray[arrayPointer].substring(0, 1) + 'Standard.jpg');
				}
				a.onfocus = function() {
					var theImg = this.childNodes[0];
					var currentSrc = theImg.getAttribute("src");
					var tempArray = currentSrc.split("/");
					var arrayPointer = (tempArray.length - 1);
					theImg.setAttribute("src", 'http://www.missouristate.edu/images/CampusMap/' + tempArray[arrayPointer].substring(0, 1) + 'Blue.jpg');
				}
				a.onblur = function() {
					var theImg = this.childNodes[0];
					var currentSrc = theImg.getAttribute("src");
					var tempArray = currentSrc.split("/");
					var arrayPointer = (tempArray.length - 1);
					theImg.setAttribute("src", 'http://www.missouristate.edu/images/CampusMap/' + tempArray[arrayPointer].substring(0, 1) + 'Standard.jpg');
				}
			}
		}
	}
}

addLoadEvent(prepareShowImage);