function onMouse() {
	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 == 'ro') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+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('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

//window.onload = init;

Images = new Array();
//Images[0]= "/images/side_menu/cap_bg_on.gif";
//Images[1]= "/images/side_menu/cap2_bg_on.gif";

function PreloadImg(){
	for(i=0; i<Images.length; i++){
		ImageName = "Image"+ i;
		var ImageName = new Image();
		ImageName.src = Images[i];
	}
}

function init() {
	onMouse();
	PreloadImg();
}