function pollUserChoiceNotEmpty(){
	var pollUserChoice = document.getElementsByName("user_choice");
	var checked = false;
	
	for(i=0; i<pollUserChoice.length; i++){
		if(pollUserChoice[i].checked){
			checked = true;
		};
	}
	
	if(!checked){
		alert("Please make a choice before click the vote button.")
		return checked;
	}
	
	/*
	if(pollUserChoice.value == null || pollUserChoice.value == ""){
		alert(pollUserChoice.value);
		alert(pollUserChoice.length);
		
	
		alert("Please make a choice before click the vote button.");
		return false;
	}
	*/
}