var xmlhttp;

function getVote() {

	var x = document.getElementsByName('r')
	var poll_id = document.encuesta.poll_id
	for(var k=0;k<x.length;k++)
	if(x[k].checked) {

	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {

		alert ("Browser does not support HTTP Request");
		return;
	}

	var url="poll_vote.php";
	url=url+"?vote="+x[k].value;
	url=url+"&poll_id="+poll_id.value;
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
	}
}

function stateChanged() {

	if (xmlhttp.readyState==4) {

		document.getElementById("poll").innerHTML=xmlhttp.responseText;
	}
}

function GetXmlHttpObject() {

	var objXMLHttp=null;
	if (window.XMLHttpRequest) {

		objXMLHttp=new XMLHttpRequest();
	} else if (window.ActiveXObject) {

		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}

	return objXMLHttp;
}