function addEventToObject(obj, evt, func) {
	var oldhandler = obj[evt];
	obj[evt] = (typeof obj[evt] != 'function') ? func : function(){oldhandler();func();};
}

function scroller() {
	if (!(browser.isIE&&browser.isMac)) {
		if (document.getElementById('scroller')) {
			var scroller = document.getElementById('scroller');
			var imgs = scroller.getElementsByTagName('img');
			var imgsLeft = new Array();
			var leftTemp = 0;
			for (i=0;i<imgs.length;i++) {
				imgsLeft[i] = leftTemp;
				imgs[i].w = (browser.isIE == false) ? parseInt(document.defaultView.getComputedStyle(imgs[i], '').getPropertyValue("width")) : parseInt(imgs[i].width);
				leftTemp += imgs[i].w;
			}
			var isScrollingReady = function() {
				for (i=0;i<imgs.length;i++) { 
					if (document.images[i].complete == false) {
						return false;
						break;
					}
				}
				return true;
			}
			var doScroll = function() {
				for (i=0;i<imgs.length;i++) {
					imgsLeft[i] = imgsLeft[i] - 1;
					if (imgsLeft[i] <= -(imgs[i].w)) {
						leftTemp = 0;
						for (j=0;j<imgs.length;j++){
							if (j != i) {leftTemp = leftTemp + imgs[j].w;}		
						}
						imgsLeft[i] = leftTemp;
					}
					imgs[i].style.left = imgsLeft[i] + "px";
				}
			}
			var startScroll = function() {
				if (isScrollingReady() == true) {	
					for (j=0;j<imgs.length;j++) {
						imgs[j].style.left = imgsLeft[j] + "px";
						imgs[j].style.top = "0px";
						imgs[j].style.position = "absolute";
						if (browser.isIE&&browser.isWin) {
							var src = imgs[j].src;
							var elem = document.createElement('div');
							elem.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizing='scale')";
							elem.style.width = imgs[j].width + "px";
							elem.style.height = imgs[j].height + "px";
							//imgs[j].childNodes[0].replaceNode(elem);						
						}
					}
					window.clearInterval(scrollPause);
					var interval = (scroller.className) ? scroller.className.substring(10,scroller.className.length) : 29;
					var scrollInterval = (browser.isIE == true && browser.isMac == true) ? setInterval(doScroll(),interval) : setInterval(doScroll,interval);
				} 
			}
			var scrollPause = (browser.isIE == true && browser.isMac == true) ? setInterval(startScroll(),100) : setInterval(startScroll,100);
		}
	}
}

function detect() {
	// simplify things
	var agent 	= navigator.userAgent.toLowerCase();
	
	// detect platform
	this.isMac		= (agent.indexOf('mac') != -1);
	this.isWin		= (agent.indexOf('win') != -1);
	this.isWin2k	= (this.isWin && (
			agent.indexOf('nt 5') != -1));
	this.isWinSP2	= (this.isWin && (
			agent.indexOf('xp') != -1 || 
			agent.indexOf('sv1') != -1));
	this.isOther	= (
			agent.indexOf('unix') != -1 || 
			agent.indexOf('sunos') != -1 || 
			agent.indexOf('bsd') != -1 ||
			agent.indexOf('x11') != -1 || 
			agent.indexOf('linux') != -1);
	
	// detect browser
	this.isSafari	= (agent.indexOf('safari') != -1);
	this.isSafari2 = (this.isSafari && (parseFloat(agent.substring(agent.indexOf("applewebkit/")+"applewebkit/".length,agent.length).substring(0,agent.substring(agent.indexOf("applewebkit/")+"applewebkit/".length,agent.length).indexOf(' '))) >=  300));
	this.isOpera	= (agent.indexOf('opera') != -1);
	this.isNN		= (agent.indexOf('netscape') != -1);
	this.isIE		= (agent.indexOf('msie') != -1);
	this.isFirefox	= (agent.indexOf('firefox') != -1);
}
var browser = new detect();

addEventToObject(window,'onload', scroller);