function validarvote(){
	form=document.formPoll;
	c=0;
	for (i=0;i<form.encuesta.length;i++){
		if (form.encuesta[i].checked){
			c=1;
			break;
		}
	}
	if (c==0){
		alert ("You must choose any option to vote");
		return;
	}
	form.submit();
}