var xmlHttp
function addvoto()
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var val = 0;
 for( i = 0; i < document.enq.resposta.length; i++ )
 {
 if( document.enq.resposta[i].checked == true )
 val = document.enq.resposta[i].value;
}
var url="enquetes/vota.php"
url=url+"?q="+val
url=url+"&id="+document.enq.idenq.value;
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("res_enq").innerHTML=xmlHttp.responseText 
} 
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}


<!--
function abre(url,janela,larg,alt,scroll){
if (!scroll) { scroll='auto' }
window.open(url,janela,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+scroll+",resizable=no,copyhistory=no,width="+larg+",height="+alt);
}
-->