Question

以下代码仅在函数setDiv，行

时有效

    //alert("waarom fout");

没有评论，这怎么可能？

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
    <html>
    <head>
      <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
      <link href="stijl.css" rel="stylesheet" type="text/css" />
      <title>garage DDT</title>
    <script>
    function getHTTPObject()
    {
        if (window.ActiveXObject)
            return new ActiveXObject("Microsoft.XMLHTTP");
        else if (window.XMLHttpRequest)
            return new XMLHttpRequest();
        else{
            alert("Your web browser does not support AJAX.");
        return null;
        }
    }


    function setDiv(s){
        //alert("waarom fout");
        if(httpObject.readyState==4){
            document.getElementById(s).innerHTML=httpObject.responseText;
        }
    }

    function vulDiv(s){
        query="occasiewagens2.php?action="+s;
        if(s=="tabel" || s=="model")
            query+="&merk="+document.getElementById("merkSelect").options[document.getElementById("merkSelect").selectedIndex].value;
        if(s=="tabel")
            query+="&model="+document.getElementById("modelSelect").options[document.getElementById("modelSelect").selectedIndex].value;
        httpObject=getHTTPObject();
        if(httpObject != null){
            httpObject.open("GET",query, true);
            httpObject.send(null);
        httpObject.onreadystatechange=setDiv(s);
    }
    }
    var httpObject=null;
    </script>
</head>
<body>
<div >
<?php include("header.php") ?>

    <input type="button" value="Zoek occasie" onclick="vulDiv('merk')"/>
    <p id="merk"> </p>
    <p id="model"> </p>

    <div id="tabel">
    </div>
</div>
</body>
</html>

Answer 1

您没有分配该功能，而是立即执行该功能

httpObject.onreadystatechange=setDiv(s);

//vs

httpObject.onreadystatechange = function () {
    setDiv(s);
};

没有警告框，Ajax不起作用

1 个答案: