PHP Ajax留言板

create table t_message(id int auto_increment primary key,email varchar(100),content text);

<div style="width:800px;margin:0 auto;">	<form action="#" >	 <fieldset>    <legend>Leave Message Here</legend>    <table>		<tr>			<td>Email:</td>			<td><input name="email"  id="email" type="email" /></td>		</tr>		<tr>			<td>Content:</td>			<td><textarea name="content" id="content" cols="80" rows="6" ></textarea></td>		</tr>		<tr>			<td></td>			<td><input name="button1" type="button" value="Post" onclick="doRequestUsingPOST()" /></td>		</tr>	</table>  </fieldset> </form></div>

 var xmlHttp;  function createXMLHttpRequest(){    if(window.ActiveXObject)      {         xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");      }      else if(window.XMLHttpRequest)      {        xmlHttp = new XMLHttpRequest();      }else{        alert("浏览器不支持XMLHttpRequest对象");      }  }

function createQueryString(){    var email = document.getElementById("email").value;    var content = document.getElementById("content").value;    var queryString = "email="+ email + "&content="+ content ;    //alert(queryString);    return queryString;  }

function doRequestUsingPOST(){    createXMLHttpRequest();    var url = "message_ajax.php?timeStamp=" + new Date().getTime();    var queryString = createQueryString();    xmlHttp.open("POST",url,true);    xmlHttp.onreadystatechange = handleStateChange;    xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");    xmlHttp.send(queryString);  }

function handleStateChange(){     if(xmlHttp.readyState == 4){        if(xmlHttp.status == 200){           parseResult();           //alert("OK");        }     }  }  function parseResult(){    var responseDiv = document.getElementById("newmessage");    if(responseDiv.hasChildNodes()){      responseDiv.removeChild(responseDiv.childNodes[0]);    }    var responseText = xmlHttp.responseText;//document.createTextNode(xmlHttp.responseText);    responseDiv.innerHTML = responseText;    //responseDiv.appendChild(responseText);  }

<?php        include_once("config.php");    	$email = strip_tags($_POST['email']);    	$content = strip_tags($_POST['content']);    	$sql1 = "insert into t_message values(NULL, '"  . $email . "' ,'".$content."')";        mysql_query($sql1);      $sql = "SELECT * FROM `t_message` order by id desc LIMIT 10";      $result = mysql_query($sql);      $responseText = "<table>";      while($message = mysql_fetch_array($result)){      	$onemessage = "				<tr>					<th style='background-color:gray;'>Email:</th>					<td>".$message['email']."</td>				</tr>				<tr style='border-bottom:1px gray dashed;'>					<th style='background-color:gray;'>Content:</th>					<td>".$message['content']."</td>				</tr>";				$responseText = $responseText.$onemessage;			}			$responseText = $responseText."</table>";			echo $responseText;?>