function callToAction(){
		if(!document.getElementById){
			return false;
		}
		var button = document.getElementById("callToAction_next");
		button.onmouseover = function(){
			var src = this.getAttribute("src");
			var hsrc = src.replace(".gif", "-over"+".gif");
			this.setAttribute("src", hsrc);
		}
		button.onmouseout = function(){
			var src = this.getAttribute("src");
			var osrc = src.replace("-over.gif", ".gif");
			this.setAttribute("src", osrc);
		}
	}
	
	addLoadEvent(callToAction);