// JavaScript Document
	function check_rd(idvote,type){
		
		var frm = eval('document.frmvote_'+idvote);
		var select_option = false; 
		var value_vote = 0;
		for (i = 0; i < frm.rd_vote.length; i++){
			if (frm.rd_vote[i].checked){
				select_option = true;
				value_vote = frm.rd_vote[i].value;
			}	
		}
		var voteid = frm.vote_id.value;
		if(!select_option){
			alert('Hãy chọn một câu trả lời');
			return false;
		}else{
			ajaxPreview(voteid,value_vote,'no',type);
		}
		
		return true;

	}

var ajax;
function createHttpRequest() {
	if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		try {
			return new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				return new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
				return null;
			}
		}
	}
}
function ajaxPreview(idvote,idchoice,cmd,type) {

	var ajax = idvote;
	ajax = createHttpRequest();	
	ajax.open('POST', 'vote.php', true);
	ajax.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	ajax.send('choice='+idchoice+'&idvote='+idvote+'&cmd='+cmd+'&type='+type);
	ajax.onreadystatechange = function(){
				var name_tab = 'vote_result_'+idvote;
				if (ajax.readyState==4 && ajax.status==200) {
					document.getElementById(name_tab).innerHTML = ajax.responseText;		
				} else {
					document.getElementById(name_tab).innerHTML = '<br>Loading...';
				}	
		}
}