改版了网上的一个js操作userdata_javascript技巧

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下面是其它网友文章:
js 保存大量数据.
IE系列存储到电脑上,直到删除文件.
FF关闭则删除
代码如下:

//userData类
var RuserData={
o:null,
timeExpires:7,
browser:'',
//初始化userdata
init:function()
{
if(this.browser != '')
return true;
if(window.ActiveXObject)//for IE {
try{
this.o=document.createElement("input");
this.o.id="Ruserdata";
this.o.type="hidden";
this.o.style.behavior="url(#default#userData)";
this.browser='ie';
document.body.appendChild(this.o);
return true;
}catch(e){return false;}
}else if(window.sessionStorage)//FF 2.0+*/
{
try{
this.o=window.sessionStorage;
this.browser='ff';
return true;
}catch(e){return false;}
}
return false;
},
setVal:function(key,val,timeout/*正定义超时时间,为空用默认值*/){
this.init();
if(this.browser == 'ie'){
try{
this.o.load(key);
this.o.expires=typeof timeout == 'undefined' ? this.getTimeLimit(this.timeExpires) : this.getTimeLimit(timeout);
this.o.setAttribute('value',val);
this.o.save(key);
return true;
}catch(e){return false}
}else if(this.browser == 'ff'){
try{this.o.setItem(key,val);return true;}
catch(e){return false}
}
},
getVal:function(key){
this.init();
if(this.browser == 'ie'){
try{
this.o.load(key);
return this.o.getAttribute('value');
}catch(e){return false;}
}else if(this.browser == 'ff'){
try{return this.o.getItem(key);}
catch(e){return false}
}
},
delVal:function(key){
this.init();
if(this.browser == 'ie'){
try{
this.o.load(key);
this.o.expires=new Date(315532799000).toUTCString();
this.o.save(key);
return true;
}
catch(e){return false;}
}else if(this.browser == 'ff'){
try{this.o.removeItem(key);return true;}
catch(e){return false}
}
},
getTimeLimit:function(days/*设置超时天数*/){
var d=new Date();
d.setDate(d.getDate() + days);
return d.toUTCString();
}
};
window.onload=function(){
//alert(RuserData.delVal('renchao'));
//alert(RuserData.setVal('renchao','脚本之家www.gxlcms.com'));
alert(RuserData.getVal('renchao'));
}


使用方法:
代码如下:
window.onload=function(){
//alert(RuserData.delVal('renchao'));
//alert(RuserData.setVal('renchao','脚本之家www.gxlcms.com'));
alert(RuserData.getVal('renchao'));
}