if(!window.ajax){
	function ajax()
	{
		var ajax;
		try {
			ajax = new XMLHttpRequest();
		} 
		catch(ee) {
			try {
				ajax = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch(e) {
				try {
					ajax = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch(E) {
					ajax = false;
				}
			}
		}
		return ajax;
	}
}

function mostrarBanner(width, height, banner, agent)
{
	var pasta = "http://www.maringa.com/";
	document.write('<div style="width:'+width+'px;height:'+height+'px;" id="banner'+banner+'"> </div>');
	
	var Ajax = ajax();
	var dataPost = '&width='+width+'&height='+height+'&agent='+agent+'&codigo='+banner;
	
	Ajax.open('POST', pasta+'mostraBanner.php', true);
	Ajax.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	Ajax.onreadystatechange = function(){
		
		if(Ajax.readyState == 4)
		{
			if(Ajax.status == 200)
			{
				var res = Ajax.responseText;
				if(res.substr(0,2) == "<a")
					document.getElementById('banner'+banner).innerHTML = res;
				else{
					var flashvars = {};
					var params = {wmode:"transparent"};
					var attributes = {};
					eval(res);
				}
			}
		}
	}
	Ajax.send(dataPost);
}