js对本地cookie的操作

     设置  获取  删除  cookie的操作

  ///////////////////////////////////////
function setCookie(name, value)
 {
    var argv = setCookie.arguments;
    var argc = setCookie.arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    if(expires!=null)
     {
        var LargeExpDate = new Date ();
        LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*3600*24));        
    }
    document.cookie = name + "=" + escape (value)+((expires == null) ? "" : ("; expires=" +LargeExpDate.toGMTString()));
}
 
function getCookie(Name)
 {
    var search = Name + "=" ;
    if(document.cookie.length > 0)
    {
        offset = document.cookie.indexOf(search)
        if(offset != -1)
        {
            offset += search.length
            end = document.cookie.indexOf(";", offset)
            if(end == -1) end = document.cookie.length
            return unescape(document.cookie.substring(offset, end))
        }
        else return ""
    }
}
 
function deleteCookie(name)
 {
                     var expdate = new Date();
                     expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
    setCookie(name, "", expdate);
}