ajax.html
<html>
<body>
<script language="JavaScript">
<!--
var agt = navigator.userAgent.toLowerCase();
var is_opera = (agt.indexOf("opera") != -1);
var is_ie = (agt.indexOf("msie") != -1) && document.all && !is_opera;
var is_ie5 = (agt.indexOf("msie 5") != -1) && document.all;
/**
* XML Http requests
*/
function CreateXmlHttpReq(handler) {
var xmlhttp = null;
if (is_ie) {
// Guaranteed to be ie5 or ie6
var control = (is_ie5) ? "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP";
try {
xmlhttp = new ActiveXObject(control);
} catch(e) {
// TODO: better help message
alert("You need to enable active scripting and activeX controls");
}
} else if(typeof XMLHttpRequest!='undefined'){
// Mozilla
xmlhttp = new XMLHttpRequest();
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
//alert( xmlhttp.statusText);//ok
handler(xmlhttp);
}
};
return xmlhttp;
} // Send a request to the server
function StartGETRequest(url, handler) {
var xmlhttp = CreateXmlHttpReq(handler);
xmlhttp.open('GET', url, true);
xmlhttp.send(null);
}
function addclick(){
a = document.getElementById("txtbox_a").value;
b = document.getElementById("txtbox_b").value;
echoResult = function(xmlhttp){
document.getElementById('result').innerHTML = "Result:" + xmlhttp.responseText;
}
StartGETRequest("calculator.php?a="+a+"&b="+b,echoResult);
}
//-->
</script>
<input id=txtbox_a value=1><br>
<input id=txtbox_b value=1><br>
<INPUT onclick=addclick() type=button value=Add name=Button>
<DIV id=result>Result:2</div>
</body>
</html>
calculator.php
<?
echo $_GET["a"] + $_GET["b"]; 不过只能在WINDOWS下运行～～～ 那么这个实际上就没有什么意义呢？
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2005年10月29日12:06星期六 [Dev开发] 
