📄 ajax.htm
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<html>
<head>
<title>Ajax：：www.10000o.com.cn 吕昆的博客欢迎您的光临</title>
<script language="javascript">
var xmlHttp
function showHint(str)
{
if (str.length > 0)
{
var url="GetRequest.aspx?name=" + str
if (window.ActiveXObject) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlHttp=GetXmlHttpObject(stateChanged)
xmlHttp.open("POST", url , true)
xmlHttp.send(null)
}
else
{
document.getElementById("txtHint").innerHTML=""
}
}
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText
}
}
function GetXmlHttpObject(handler)
{
var objXmlHttp=null
if (navigator.userAgent.indexOf("Opera")>=0)
{
alert("This example doesnt work in Opera")
return;
}
if (navigator.userAgent.indexOf("MSIE")>=0)
{
var strName="Msxml2.XMLHTTP"
if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
{
strName="Microsoft.XMLHTTP"
}
try
{
objXmlHttp=new ActiveXObject(strName)
objXmlHttp.onreadystatechange=handler
return objXmlHttp
}
catch(e)
{
alert("Error. Scripting for ActiveX might be disabled")
return
}
}
if (navigator.userAgent.indexOf("Mozilla")>=0)
{
objXmlHttp=new XMLHttpRequest()
objXmlHttp.onload=handler
objXmlHttp.onerror=handler
return objXmlHttp
}
}
</script>
</head><body>
<div class=content>
<hr>
<h3><a href="Http://www.10000o.com.cn">吕昆的博客</a>www.10000o.com.cn欢迎您的光临!</h3>
<hr>
<h5>ajax计算字符串长度</h5>
<form>
<p>输入一个字符串:<input type="text" id="txt1"onkeyup="showHint(this.value)"></p>
<p>
字符串的长度: <span id="txtHint" color=red></span></p>
</form> </div></body>
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