PHP ajax xml 实例 - 自学教程(runoops.com)

<html>
<head>
<meta charset="utf-8">
<title>PHP ajax xml 实例 - 自学教程(runoops.com)</title>
<script>
function showCD(str)
{
    if (str=="")
    {
        document.getElementById("txtHint").innerHTML="";
        return;
    } 
    if (window.XMLHttpRequest)
    {
        // IE7+, Firefox, Chrome, Opera, Safari 浏览器执行
        xmlhttp=new XMLHttpRequest();
    }
    else
    {
        // IE6, IE5 浏览器执行
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function()
    {
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
        }
    }
    xmlhttp.open("GET","/sources/php7/getcd.php?q="+str,true);
    xmlhttp.send();
}
</script>
</head>
<body>

<form>
Select a CD:
<select name="cds" onchange="showCD(this.value)">
<option value="">Select a CD:</option>
<option value="Bob Dylan">Bob Dylan</option>
<option value="Bonnie Tyler">Bonnie Tyler</option>
<option value="Dolly Parton">Dolly Parton</option>
</select>
</form>
<div id="txtHint"><b>CD info will be listed here...</b></div>

</body>
</html>