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getElementsByTagName有关问题求解

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2016-06-13 11:21:34871browse

getElementsByTagName问题求解

<html><br /><head><br /><br /><?php<br />	$username=$_GET['username'];<br />	$username=trim($username);//去掉空格<br />	session_start();<br />	$loginuser=$_SESSION['loginuser'];<br />?><br /><br /><meta http-equiv="content-type" content="text/html;charset=utf-8"/><br /><script src="my.js"></script><br /><script><br />	window.resizeTo(500,400);<br /><br /><br />	window.setInterval("getMessage()",5000);<br />	<br />	function getMessage(){	<br />		var myXmlHttpRequest=getXmlHttpObject();<br />		if(myXmlHttpRequest){	<br />			var url="GetMessageControl.php";<br />			var data="getter=<?php echo $loginuser; ?>&sender=<?php echo $username; ?>";<br />			myXmlHttpRequest.open("post",url,true);<br />			myXmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");<br />			//重点。指定处理结果的 函数<br />			myXmlHttpRequest.onreadystatechange=function (){<br />				if(myXmlHttpRequest.readyState==4){<br />					if(myXmlHttpRequest.status==200){<br />						var mesRes=myXmlHttpRequest.responseXML;<br />						var cons=mesRes.getElementsByTagName("con");<br />						var sendTimes=mesRes.getElementsByTagName("sendTime");<br />						window.alert(cons.length);<br />						if(cons.length!=0){<br />							for(var i=0;i<cons.length;i++){<br />								$('mycons').value+="<?php echo $username; ?>对<?php echo $loginuser; ?>说："+cons[i].childNodes[0].nodeValue+" "+sendTimes[i].childNodes[0].nodeValue; <br />							<br />							}<br />						}<br />					}<br />				}<br />			<br />			}<br />			myXmlHttpRequest.send(data);<br /><br /><br />		}<br />	<br />	}<br /><br /><br /><br />	function sendMessage(){<br />		var myXmlHttpRequest=getXmlHttpObject();<br /><br />		if(myXmlHttpRequest){<br />			var url="SendMessageControl.php";<br />			//js中使用php数据<br />			var data="con="+$('con').value+"&getter=<?php echo $username; ?>&sender=<?php echo $loginuser; ?>";<br />			window.alert(data);<br />		<br />			myXmlHttpRequest.open("post",url,true);<br />			myXmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");<br />			myXmlHttpRequest.onreadystatechange=function (){<br />				if(myXmlHttpRequest.readyState==4){<br />					if(myXmlHttpRequest.status==200){<br />						<br />					}<br />				}<br />			<br />			}<br />			myXmlHttpRequest.send(data);<br />		}<br />	<br />	}<br /></script><br /></head><br /><br /><br /><br /><center><br /><h1>聊天室（您正在和<font color="red"><?php echo $username; ?></font>聊天）</h1><br />	<textarea cols="30" rows="10" id="mycons"></textarea><br><br />	<input type="text" style="width:200px" id="con"><br />	<input type="button" value="send" onclick="sendMessage()"><br /><br /><br /><br /></center><br /><br /></html><br />




<?php <br />	include 'SqlHelper.class.php';<br><br><br>	class MessageService{<br>		//将数据信息添加到数据库<br>		function addMessage($sender,$getter,$con){<br>			$sql="insert into message (sender,getter,content,sendTime) values('$sender','$getter','$con',now())";<br>			<br>		//	file_put_contents("d:/test.txt","sql=".$sql."\r\n",FILE_APPEND);	<br>	<br>			$sqlHelper=new SqlHelper();<br>			return $sqlHelper->execute_dml($sql);<br>			<br>			<br>		<br>		}<br>		//获取信息，并把数据组装好返回给客户端（聊天室）<br>		function getMessage($getter,$sender){<br>			$sql="select * from message where getter='$getter' and sender='$sender' and isGet=0";<br>		<br><br>			$sqlHelper=new SqlHelper();<div class="clear">
                 
              
              
        
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