1.Default.htm
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="js.js" type="text/javascript"></script>
<title>TestJS</title>
</head>
<body onload="doOnLoad();">
<input type="button" id="btnTest" value="Test" disabled="disabled"/>
<br />
<input type="text" id="txtJSName" value="1" />
<input type="button" id="btnGetJS" value="GetJS" />
</body>
</html>
2.js.js
function doOnLoad(){
document.getElementById('btnTest').onclick = doTest;
document.getElementById('btnGetJS').onclick = doGetJS;
}
function doTest(){
var jsTest = test;
if(jsTest){
jsTest();
checkBtnTest('myjs');
}
else{
alert('无函数！');
}
}
function doGetJS(){
checkBtnTest('myjs');
var jsName = 'js' + document.getElementById('txtJSName').value + '.js';
AjaxPage('myjs', jsName);
}
function GetHttpRequest() {
if (window.XMLHttpRequest){//Gecko
return new XMLHttpRequest();
}
else if (window.ActiveXObject){//IE
return new ActiveXObject("MsXml2.XmlHttp");
}
}
function AjaxPage(sId, url){
var oXmlHttp = GetHttpRequest();
oXmlHttp.OnReadyStateChange = function(){
if ( oXmlHttp.readyState == 4 ){
if (oXmlHttp.status == 200 || oXmlHttp.status == 304){
IncludeJS( sId, url, oXmlHttp.responseText );
}
else{
alert('XML request error: ' + oXmlHttp.statusText + ' (' + oXmlHttp.status + ')');
}
}
}
oXmlHttp.open('GET', url, true);
oXmlHttp.send(null);
}
function IncludeJS(sId, fileUrl, source){
if(source != null){
var scriptTag = document.getElementById(sId);
var oHead = document.getElementsByTagName('HEAD').item(0);
if(scriptTag){
oHead.removeChild(scriptTag);
}
var oScript = document.createElement( "script" );
oScript.language = "javascript";
oScript.type = "text/javascript";
oScript.id = sId;
oScript.defer = true;
oScript.text = source;
oHead.appendChild(oScript);
checkBtnTest(sId);
}
}
function checkBtnTest(sId){
var scriptTag = document.getElementById(sId);
if(scriptTag){
document.getElementById('btnTest').setAttribute('disabled', false);
}
else{
document.getElementById('btnTest').setAttribute('disabled', true);
}
}
3. js1.js 和 js2.js
function test(){
alert('js1.js');
}
function test(){
alert('js2.js');
}
4. 动态加CSS样式
function IncludeCSS(sId, fileUrl){
var cssTag = document.getElementById(sId);
var oHead = document.getElementsByTagName('HEAD').item(0);
if(cssTag){
oHead.removeChild(cssTag);
}
var oCss = document.createElement('link');
oCss.id = sId;
oCss.href = fileUrl;
oCss.rel = 'stylesheet';
oCss.type = 'text/css';
oHead.appendChild(oCss);
}
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