JavaScript操作Cookie

//JavaScript根据值获取Cookie

document.getCookie=function(key){
    var cookieStr = document.cookie;
    var cookieArr = cookieStr.split(";");
    for(var i = 0;i<cookieArr.length;i++){
        var cookie = cookieArr[i].split("=");
        if(key == cookie[0]){
            return cookie[1];
        }
    }
}