function smartRollover() {   
    if(document.getElementsByTagName) {   
        var images = document.getElementsByTagName("img");   
        for(var i=0; i < images.length; i++) {   
            if(images[i].getAttribute("src").match("_n."))   
            {   
                images[i].onmouseover = function() {   
                    this.setAttribute("src", this.getAttribute("src").replace("_n.", "_o."));   
                }   
                images[i].onmouseout = function() {   
                    this.setAttribute("src", this.getAttribute("src").replace("_o.", "_n."));   
                }   
            }   
        }   
    }   
}   
if(window.addEventListener) {   
    window.addEventListener("load", smartRollover, false);   
}   
else if(window.attachEvent) {   
    window.attachEvent("onload", smartRollover);   
}  



/*function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;*/