JavaScript Cookie 工具种

function Cookie(name){
    this.$name=name;//Remember the name of this cookie
    var allCookies=document.cookie; //Get a list of all  cookies pertain to this document
    if(allCookies == "") return;//If there are no cookies, we don't have anything to do.

    var cookies=allCookies.split(";");//Break the string of all cookies into individual cookie strings
    var cookie=null;
    for(var i=0;i<cookies.length;i++){//Loop through the cookie strings, looking for our name
        if(cookies[i].substring(0,name.length+1)==(name+'=')){//Does this cookie string begin with the name we want?
            cookie=cookies[i];break;
        }
    }

    if(cookie==null) return;//If we didn't find a matching cookie, quit now

    var cookieValue=cookie.substring(name.length+1);//Get the cookie value

    var a=cookieValue.split('&');//Break the cookie value into an array of name/value pairs
    for(var i=0;i<a.length;i++){//Break each pair into an array
        a[i]=a[i].split(':');
    }
    for(var i=0;i<a.length;i++){
        this[a[i][0]]=decodeURIComponent(a[i][1]);
    }
}
Cookie.prototype.store=function(daysToLive,path,domain,secure){
    var cookieValue='';
    for(var prop in this){//Loop through the Cookie object and put together the value of the cookie
        if((prop.charAt(0)=='$') || (typeof this[prop])=='function'){continue;}
        if(cookieValue!='') cookieValue +='&';
        cookieValue += prop + ':' +encodeURIComponent(this[prop]);
    }

    var cookie=this.$name+'='+cookieValue;
    if(daysToLive || daysToLive==0) cookie+="; max-age="+(daysToLive*24*60*60);
    if(path) cookie+="; path="+path; 
    if(domain) cookie+="; domain="+domain;
    if(secure) cookie+="; "+secure;

    document.cookie=cookie;
}
Cookie.prototype.remove=function(path,domain,secure){
    for(var prop in this){
        if(prop.charAt(0)!='$' && typeof this[prop] !='function'){
            delete this[prop];
        }
    }
    this.store(0,path,domain,secure);
}
Cookie.enabled=function(){
    if(window.navigator.cookieEnabled != undefined) return window.navigator.cookieEnabled;
    if(Cookie.enabled.cache != undefined) return Cookie.enabled.cache;
    document.cookie="testCookie=test; max-age=10000";
    var cookies=document.cookie;
    if(cookies.indexOf("testCookie")==-1){
        return Cookie.enabled.cache=false;
    }else{
        document.cookie="testCookie=test; max-age=0";
        return Cookie.enabled.cache=true;
    }
}