function GetXMLHttp() {

    if(navigator.appName == "Microsoft Internet Explorer") {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else {
        xmlHttp = new XMLHttpRequest();
    }
    return xmlHttp;
}

var xmlRequest = GetXMLHttp();

function chama_abrirPag(url) {
	abrirPag(url);
}


function abrirPag(valor){

	var url = valor;
	
	xmlRequest.open("GET",url,true);
	xmlRequest.onreadystatechange = mudancaEstado;
	xmlRequest.send(null);
	
	if (xmlRequest.readyState == 1) {
	  document.getElementById("enquete").innerHTML = "<img src='imgs/loader.gif'>";
	  }
	return url;
}
	
	
function mudancaEstado(){
		if (xmlRequest.readyState == 4){
		document.getElementById("enquete").innerHTML = xmlRequest.responseText;
	}
}