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

/* For sidebar bottom-right buttons */

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');
            //Make sure the hover effect has not already been added		
		    if (src.indexOf('_o.') == -1)
		    {
		        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;