1. HTML Code(clienthint.htm):
<html>
<head>
<script src="clienthint.js"></script>
</head>
<body>
<h3><a href="http://www.w3school.com.cn/php/php_ajax_suggest.asp">Ajax Suggest</a></h3>
<form>
First Name: <input type="text" id="txt1" onkeyup="showHint(this.value)">
</form>
<p>Suggestions: <span id="txtHint" /></p>
<a href="index.htm">Home</a>
</body>
</html>
2. Javascript Code(clienthint.js):
var xmlHttp;
function showHint(str) {
if (str.length==0) {
document.getElementById("txtHint").innerHTML="";
return;
}
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null) {
alert ("Browser does not support HTTP Request");
return;
}
var url="clienthint.php";
url=url+"?q="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
function stateChanged() {
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
document.getElementById("txtHint").innerHTML=xmlHttp.responseText
}
}
function GetXmlHttpObject() {
var xmlHttp=null;
try {
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
3. PHP Code(clienthint.php):
<?php
// Fill up array with names
$a[]="Anna";
$a[]="Brittany";
$a[]="Cinderella";
$a[]="Diana";
$a[]="Eva";
$a[]="Eric";
$a[]="Fiona";
$a[]="Gunda";
$a[]="Hege";
$a[]="Inga";
$a[]="Johanna";
$a[]="Kitty";
$a[]="Linda";
$a[]="Nina";
$a[]="Ophelia";
$a[]="Petunia";
$a[]="Amanda";
$a[]="Raquel";
$a[]="Cindy";
$a[]="Doris";
$a[]="Eve";
$a[]="Evita";
$a[]="Sunniva";
$a[]="Tove";
$a[]="Unni";
$a[]="Violet";
$a[]="Liza";
$a[]="Elizabeth";
$a[]="Ellen";
$a[]="Wenche";
$a[]="Vicky";
//get the q parameter from URL
$q=$_GET["q"];
//lookup all hints from array if length of q>0
if (strlen($q) > 0) {
$hint="";
for($i=0; $i<count($a); $i++) {
if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q)))) {
if ($hint=="") {
$hint=$a[$i];
} else {
$hint=$hint." , ".$a[$i];
}
}
}
}
//Set output to "no suggestion" if no hint were found
//or to the correct values
if ($hint == "") {
$response="no suggestion";
} else {
$response=$hint;
}
//output the response
echo $response;
?>
4. 寫好後, 執行 clienthint.htm , 完成!
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