js cookie操作方法

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//获取Cookie数组

function getCookie(){

    var array=new Array();

    var cookies=document.cookie.split(/;/g);

    for(var i=0;i<cookies.length;i++){

        var cookie=cookies[i];

        if(cookie.indexOf("=")==-1){

            continue;

        }

        var name=cookie.substring(0,cookie.indexOf("="));

        var value=cookie.substring(cookie.indexOf("=")+1);

        array[unescape(name)]=unescape(value);

    }

    return array;

}

//var array=getCookie();

//for(var a in array)

//document.write(a+":"+array[a]+"<br />");

  

//找特定的某个cookie

function getOneCookie(name){

    var array=getCookie();

    for(var a in array){

        if(a==name){

            return array[a];

        }

    }

    return null;

}

//例

//document.cookie="myname=co";

//var value=getOneCookie("myname");

//document.write(value);

  

//删除Cookie

function delOneCookie(name){

    var value=getOneCookie(name);

    if(value){

        document.cookie=name+"="+value+";expires=Tue, 25-Dec-1970 12:12:12 GMT";

    }

}

//document.cookie="myname=co";

//delOneCookie("myname");

//value=getOneCookie("myname");

//if(value)document.write(value);

 

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//设置一个cookie及有效期，单位：天

function setOneCookie(name,value,expires){

    var expDays=expires*24*3600*1000;  //有效时间长度

    var expDate=new Date();  //当前时间

    expDate.setTime(expDate.getTime()+expDays);

    var expString=expires?"; expires="+expDate.toGMTString():"";

    var pathString=";path=/";

    document.cookie=name+"="+escape(value)+expString+pathString;

}