function setupSwapImages(){
	var imgs=document.images;
	for(i=0;i<imgs.length;i++){
		setupSwapImage(imgs[i]);
	}
}
function setupSwapImage(i){
	var p = i.src.lastIndexOf(".");
	if(i.src.substr(p-2,2)=="_n"){
		n = i.src.substr(0,p-2);
		e = i.src.substr(p,i.src.length-p);
		var o = new Image();
		o.src = n + "_o" + e;
		i.out = i.src;
		i.over = o.src;
		i.onmouseout = function(){
			this.src = this.out;
		}
		i.onmouseover = function(){
			this.src = this.over;
		}
	}
}
window.onload=function(){setupSwapImages();}