/* ------------------------------------
*
*	Since: 2009-01-30
*
-------------------------------------*/

(function(){
	
	function addEvent(elm, evType, fn, useCapture) {
		if (elm.addEventListener) {
			elm.addEventListener(evType, fn, useCapture);
			return true;
		}
		else if (elm.attachEvent) {
			var r = elm.attachEvent('on' + evType, fn);
			return r;
		}
		else {
			elm['on' + evType] = fn;
		};
	};
	
	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 == 'rollover') {
				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);
				}
			}
		}
	};
	
	addEvent(window, "load", initRollovers, false);
	
})();