// JavaScript Document
function setupRollover(){
	if(!document.getElementsByTagName)
		return;
	var links_array = document.getElementsByTagName('a');
	for (var i=0; i<links_array.length; i++){
		var lnk = links_array[i];
		if(lnk.className && (' ' + lnk.className + ' ').indexOf(' rollover ') != -1){
			if(lnk.childNodes && lnk.childNodes.length == 1 && lnk.childNodes[0].nodeName.toLowerCase() == 'img'){
				lnk.onmouseover = mouseover;
				lnk.onmouseout = mouseout;
			}
		}
	}
}

function findTarget(elt){
	var target;
	
	if(window.event && window.event.srcElement)
		target = window.event.srcElement;
	else if(elt && elt.target)
		target = elt.target;
	if(!target)
		return null;
		
	while(target != document.body && target.nodeName.toLowerCase() != 'a')
		target = target.parentNode;
	
	if(target.nodeName.toLowerCase() != 'a')
		return null;
	
	return target;
}

function mouseover(elt){
	var target = findTarget(elt);
	if(!target) return;
	
	var img_tag = target.childNodes[0];
	
	img_tag.src = img_tag.src.replace(/(\.[^.]+)$/, '_over$1');
}

function mouseout(elt){
	var target = findTarget(elt);
	if(!target) return;
	
	var img_tag = target.childNodes[0];
	
	img_tag.src = img_tag.src.replace(/_over(\.[^.]+)$/, '$1');
}

window.onload = setupRollover;