保存客户端数据，ie用userdata firefox用sessionStorage
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> UserData manager </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="emu">
<META NAME="Keywords" CONTENT="IE USER DATA manager">
<META NAME="Description" CONTENT="UserData manager">
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
var isIE = !!document.all;
if(isIE)
document.documentElement.addBehavior("#default#userdata");
function saveUserData(key, value){
var ex;
if(isIE){
with(document.documentElement)try {
load(key);
setAttribute("value", value);
save(key);
return getAttribute("value");
}catch (ex){
alert(ex.message)
}
}else if(window.sessionStorage){//for firefox 2.0+
try{
sessionStorage.setItem(key,value)
}catch (ex){
alert(ex);
}
}else{
alert("当前浏览器不支持userdata或者sessionStorage特性")
}
}
function loadUserData(key){
var ex;
if(isIE){
with(document.documentElement)try{
load(key);
return getAttribute("value");
}catch (ex){
alert(ex.message);return null;
}
}else if(window.sessionStorage){//for firefox 2.0+
try{
return sessionStorage.getItem(key)
}catch (ex){
alert(ex)
}
}else{
alert("当前浏览器不支持userdata或者sessionStorage特性")
}
}
function deleteUserData(key){
var ex;
if(isIE){
with(document.documentElement)try{
load(key);
expires = new Date(315532799000).toUTCString();
save(key);
}
catch (ex){
alert(ex.message);
}
}else if(window.sessionStorage){//for firefox 2.0+
try{
sessionStorage.removeItem(key)
}catch (ex){
alert(ex)
}
}else{
alert("当前浏览器不支持userdata或者sessionStorage特性")
}
}
saveUserData("emu","hello world !")
alert(loadUserData("emu"))
deleteUserData("emu")
alert(loadUserData("emu"))
//-->
</SCRIPT>
</BODY>
</HTML>
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