function validate()	{
				var pollRad = document.poll.poll_vote;
				var isChecked;
				for (i=0;i < pollRad.length; i++) {
					if (pollRad[i].checked) { 
						isChecked = true; 
					}
				}
				if(!isChecked) {
					alert("Please select an option before voting");
					return false;
				}
				return true;
			}