function loadBanner(side){
	var url= "include/banners.php?side="+side;
	switch(side){
		case 'left':
			xmlHttpleft=GetXmlHttpObject()
			if (xmlHttpleft==null) {
				alert ("Your browser does not support AJAX!");
				return;
			} 
			xmlHttpleft.onreadystatechange=bannerleftState;
			xmlHttpleft.open("GET",url,true);
			xmlHttpleft.send(null);
			break;
		case 'right':
			xmlHttpright=GetXmlHttpObject()
			if (xmlHttpright==null) {
				alert ("Your browser does not support AJAX!");
				return;
			} 
			xmlHttpright.onreadystatechange=bannerrightState;
			xmlHttpright.open("GET",url,true);
			xmlHttpright.send(null);
			break;
	}
}
function bannerleftState() { 
	if (xmlHttpleft.readyState==4) { 
		document.getElementById('left').innerHTML=xmlHttpleft.responseText;
	}
}
function bannerrightState() { 
	if (xmlHttpright.readyState==4) { 
		document.getElementById('right').innerHTML=xmlHttpright.responseText;
	}
}