//===============================================
function SetCookie(name, value,expires){//设定Cookie值
    var expdate = new Date();
    var argv = SetCookie.arguments;
    var argc = SetCookie.arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    var path = (argc > 3) ? argv[3] : null;
    var domain = (argc > 4) ? argv[4] : null;
    var secure = (argc > 5) ? argv[5] : false;
    if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
        document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))
        +((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))
        +((secure == true) ? "; secure" : "");
    }
//=============================================
function DelCookie(name){//删除cookie
    var exp = new Date();
    exp.setTime (exp.getTime() - 1);
    document.cookie = name + "=''; expires="+ exp.toGMTString();

}

//===============================================
function jsGetCookie(name){//获得Cookie的原始值
    var cookStringArray    = window.document.cookie.split("; "); 
    for(var i=0; i<cookStringArray.length;i++){      
        var cookieInfo = cookStringArray[i].split("=");
        if(name == cookieInfo[0]) {
            return unescape(cookieInfo[1]);
        }       
      } 
    return null;
}

//=================================================
function isSetCookie(name){//js检查Cookie的函数
    var cookieValue = jsGetCookie(name);
    if (cookieValue!=null && cookieValue!=""){
        return true;
    } else {
        return false;
    }
}