var VotarEnq = true;

function Enquete(Frm, IdEnq){

	var Campo = null;

	if(VotarEnq){

		var r = Frm.opcao;

		if(!r.length && r.checked){
			Campo = r;
		}else{
			for(var i=0;i<r.length;i++){
				if(r[i].checked){
					Campo = r[i];
					break;
				}
			}
		}

		if(!Campo){
			alert('Selecione uma opção.');
			return false;
		}

	}

	if(zXmlHttp.isSupported()){

		document.getElementById('divEnquete').innerHTML = '<img id="Aguarde" src="http://www.ibdp.org.br/Arquivos/ajax.gif" alt="Aguarde..." />';
	
		var oXml = zXmlHttp.createRequest();
	
		oXml.open('POST', 'http://www.ibdp.org.br/enquetes/votar.php', true);
		oXml.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
		oXml.onreadystatechange = function(){
			if(oXml.readyState == 4 && oXml.status == 200)
				document.getElementById('divEnquete').innerHTML = unescape(oXml.responseText.replace(/\+/g, ' '));
		}

		oXml.send('Ajax=s&Enq=' + IdEnq + (VotarEnq ? ('&votar=&opcao=' + Campo.value) : ''));

		return false;

	}else
		return true;

}