function NavEvent(e) {			
	if (!e) var e = window.event;   
	switch(e.type) {
		case "click":
			break;
		case "mouseover":
			this.src = this.src.replace(/_u/,"_o");
			this.src = this.src.replace(/_d/,"_o");
			break;
		case "mouseout":
			if(this.id == CurNavItem) {
				this.src = this.src.replace(/_o/,"_d");
			}
			else {
				this.src = this.src.replace(/_o/,"_u");
			}
			break;
	}
}



	
function init() {
	var TopNav = document.getElementById("navigation");
	var NavItems = TopNav.getElementsByTagName("a");
	
	for(var ii=0;ii<NavItems.length;ii++) {
		  var ImageNode = NavItems[ii].childNodes[0];
			ImageNode.onclick = NavEvent;
			ImageNode.onmouseover = NavEvent;
			ImageNode.onmouseout = NavEvent;	
			
			//alert("Comparing " + NavItems[ii].id + " and " + CurNavItem);					
			
			if(ImageNode.id == CurNavItem) {
				ImageNode.src = ImageNode.src.replace(/_u/,"_d");
				
				ImageNode.onclick = null;
				ImageNode.onmouseover = null;
				ImageNode.onmouseout = null;	
			}
	  }		
	
}