function init(){
	if(!document.getElementsByTagName || !document.getElementsByTagName("td")) return;
	tds=document.getElementsByTagName("td");
	for(i=0;i<tds.length;i++){
		if(tds[i].className=="sidebar"){
			if(!tds[i].getElementsByTagName("a")) return;
			sidebar_links=tds[i].getElementsByTagName("a");
			for(j=0;j<sidebar_links.length;j++){
				addEvent(sidebar_links[j], 'mouseover', mover, false);
				addEvent(sidebar_links[j], 'mouseout', mout, false);
			}
		}
	}
}
function mover(e){
	var target=window.event ? window.event.srcElement : e? e.target : null;
	if(!target) return;
	target.src=target.src.substring(0,(target.src.indexOf(".jpg"))) + "_hover.jpg";
}
function mout(e){
	var target=window.event ? window.event.srcElement : e? e.target : null;
	if(!target) return;
	target.src=target.src.substring(0,(target.src.indexOf("_hover"))) + ".jpg";
}
function addEvent(elm, evType, fn, useCapture){
	if(elm.addEventListener){
		elm.addEventListener(evType, fn, useCapture);
		return true;
	}
	else if(elm.attachEvent){
		var r=elm.attachEvent('on' + evType, fn);	
		return r;
	}
	else{
		elm['on' + evType]=fn;
	}
}
addEvent(window, 'load', init, false);