function showBanner(modulo, canal, grupo, id) {
	var posBanner; // variable for posting information
	var url = location.href;
	var dominio = url.split("/");
	url = "http://"+dominio[2]+"/banner.php";
	//var url = "http://www.campogrande.news.com.br/banner.php";
	var vars = "modulo="+modulo+"&canal="+canal+"&grupo="+grupo;
	if( id )
		grupo = id;
	// branch for native XMLHttpRequest object
	if (window.XMLHttpRequest) {
		posBanner = new XMLHttpRequest();
	// branch for IE/Windows ActiveX version
	} else if (window.ActiveXObject) {
		posBanner = new ActiveXObject("Microsoft.XMLHTTP");
	}
	if( posBanner ) {
		posBanner.onreadystatechange = function () {
			// page loaded "complete"
			if (posBanner.readyState == 4 && posBanner.status == 200) {
				document.getElementById(grupo).innerHTML = posBanner.responseText;
			}
		};
		posBanner.open("POST", url, true);
		posBanner.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		posBanner.send(vars);
	}
}