function pk_vote(pid) {
	var _code = document.getElementById('passcode');	
	if ( _code ) {
		if ( _code.value.length != 4 ) {
			alert("請輸入認證碼");
			return;
		}
	}
	else { return; }
	
	/* 取得投票的結果 */
	var opts = document.getElementsByName('opt' + pid);
	if ( opts.length <= 0 ) {
		return;
	}
	else {
		var t_id = 0;
		for ( var i = 0 ; i < opts.length ; i++ ) {
			if ( opts[i].checked ) {
				t_id = opts[i].value;
			}
		}
	}
	if ( t_id <= 0 ) {
		alert('請選擇一個選項');
	}
	
	var xmlHttp = create_xmlHttpRequest();
	if ( xmlHttp && _code && t_id ) {
		var dt = new Date();
		xmlHttp.onreadystatechange = function() { handle_pk_vote(xmlHttp); };
		xmlHttp.open('GET', "/ajax/polling/vote.php?pcode=" + _code.value + "&t_id=" + t_id + "&rd=" + dt.getTime(), true);
		xmlHttp.send(null);
	}
}

function handle_pk_vote(xmlHttp) {
	if ( xmlHttp.readyState == 4 ) {
		if ( xmlHttp.status == 200 ) {
			if ( xmlHttp.responseText == '1' ) {
				alert('投票成功!');				
				
				/* 更新投票結果 */
				/* clearInterval(refresh_flag); */
				refresh_result();
				/* refresh_flag = setInterval('refresh_result()', 5000); */
			}
			else if ( xmlHttp.responseText == '2' ) {
				alert('認證碼錯誤哦!');
			}
			else {
				alert(xmlHttp.responseText);
			}

			/* 更新認證碼 */
			var dt = new Date();
			document.getElementById('img_passcode').src = "/polling/showpic.php?rd=" + dt.getTime();
			document.getElementById('passcode').value = '';
		}
		else {
			alert(xmlHttp.statusText);
		}
	}
}


function handle_refresh_result(xmlHttp) {
	if ( xmlHttp.readyState == 4 ) {
		if ( xmlHttp.status == 200 ) {
			if ( xmlHttp.responseXML ) {
				var items = xmlHttp.responseXML.getElementsByTagName('item');
				if ( items.length > 0 ) {
					for ( var i = 0 ; i < items.length ; i++ ) {
						var _item = items[i];
						var _div = document.getElementById('res_' + _item.getAttribute('id'));
						if ( _div ) {
							_div.style.width = _item.getAttribute('width') + 'px';
						}
					
						var _span = document.getElementById('count_' + _item.getAttribute('id'));
						if ( _span ) {
							_span.innerHTML = _item.getAttribute('count');
						}
						else {
							_div.innerHTML = _item.getAttribute('count');
						}
					
						/*
						var _div = document.getElementById('remain_' + _item.getAttribute('id'));
						if ( _div ) {
							var _width = parseInt(_item.getAttribute('width'));
							_width = (400 - _width - 10);
							_div.style.width =  _width + 'px';
						}
						*/
					}
				}
			}
			else {
				alert(xmlHttp.responseText);
			}
		}
		else {
			alert(xmlHttp.statusText);
		}
	}
}