/*
Standards Compliant Rollover Script
Author : Daniel Nolan
http://www.bleedingego.co.uk/webdev.php
*/

/* Rollover Menu */

function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = new Array();

	var aImgs = document.getElementsByTagName('img');
	for (var i = 0; i < aImgs.length; i++) {		
		aImages[aImages.length] = aImgs[i];
	}
	var aInputs = document.getElementsByTagName('input');
	for (var i = 0; i < aInputs.length; i++) {		
		if (aInputs[i].getAttribute('type') == 'image') {
			aImages[aImages.length] = aInputs[i];
		}
	}

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'btn' && aImages[i].src.search('-over.') == -1) {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '-over'+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('-over'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
			aImages[i].onclick = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('-over'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}