为什么readyState=1，高手帮忙看下

zbdbao 2009-04-12 09:50:11

如题，在servlet中执行的代码都正确，PrinterWriter打印出来的也有信息的，就是一直是readyState=1
本人刚开始学习Ajax，希望高手解决下，帮忙看下

<%@page pageEncoding="UTF-8"%>

<html>

 <head>

  <script type="text/javascript">

    try{

	var client = new XMLHttpRequest();

    }catch(e){

        function sendRequest(form)

        {

	var requestURL = "/validate/email.ajax";//

	requestURL += "?time=" + new Date().getTime()+"&email="+form.email.value;

	client.open("GET",requestURL,true);

	client.onreadystatechange = handResponse();

	client.send(null);

	}

	function handResponse()

        {

	 if(client.status [code=HTML]

== 4)
{
alert(responseText);
if(client.status==200){
message = client.responseText;
document.getElementById("email_info").innerHTML = message;
}
}

}
</script>
</head>
<body>
<form>
<table>
<tr>
<td>
<input type="text" name="email" onBlur="sendRequest(this.form);" />
<span id="email_info"></span>
</td>
</tr>
</table>
</form>
</body>
</html>[/code]

...全文

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phoenixad 2011-03-11

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非常感谢！

zbdbao 2009-04-14

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谢了，确实是括号的原因

Ghost_520 2009-04-13

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try{

    var client = new XMLHttpRequest();

    }catch(e){

        function sendRequest(form)

        {

    var requestURL = "/validate/email.ajax";//

    requestURL += "?time=" + new Date().getTime()+"&email="+form.email.value;

    client.open("GET",requestURL,true);

    client.onreadystatechange = handResponse();  

    client.send(null);

    }

1. client.onreadystatechange = handResponse; // 不要括号，即

2. Ajax 是不是 new 错了？



// 创建 XMLHTTP 请求

	function createRequestObject() {

    	var ro;

	    var browser = navigator.appName;

    	if(browser == "Microsoft Internet Explorer"){

        	ro = new ActiveXObject("Microsoft.XMLHTTP");

	    }else{

    	    ro = new XMLHttpRequest();

	    }

    	return ro;

	}



	var http = createRequestObject();

3. 在 handResponse 中打印出 alert(client.readyState); 看看什么值，值为 4表示成功。

zbdbao 2009-04-13

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怎么没有人理的……郁闷

zbdbao 2009-04-12

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不好意思，刚没发好

zbdbao 2009-04-12

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<%@page pageEncoding="UTF-8"%>

<html>

 <head>

  <script type="text/javascript">

    try{

    var client = new XMLHttpRequest();

    }catch(e){

        function sendRequest(form)

        {

    var requestURL = "/validate/email.ajax";//

    requestURL += "?time=" + new Date().getTime()+"&email="+form.email.value;

    client.open("GET",requestURL,true);

    client.onreadystatechange = handResponse();

    client.send(null);

    }

    function handResponse()

        {

     alert(client.status);

     if(client.status == 4) 

        { 

  message = client.responseText; 

  document.getElementById("email_info").innerHTML = message;  

} 



  } 

  </script> 

</head> 

<body> 

  <form> 

  <table> 

  <tr> 

    <td> 

    <input type="text" name="email" onBlur="sendRequest(this.form);" /> 

    <span id="email_info"> </span> 

    </td> 

  </tr> 

  </table> 

  </form> 

</body>