JS cookie 操作函数

获取cookie

<script type="text/javascript">
function getCookie(name){
    var start = document.cookie.indexOf(name + "=");
    var len = start + name.length + 1;
    if((!start) &&(name != document.cookie.substring(0, name.length))){
        return null;
    }
    if(start == -1)
        return null;
    var end = document.cookie.indexOf(';', len);
    if(end == -1)
        end = document.cookie.length;
    return unescape(document.cookie.substring(len, end));
}
</script>

设置cookie

<script type="text/javascript">
function setCookie(name, value, expires, path, domain, secure){
    var today = new Date();
    today.setTime(today.getTime());
    if(expires){
        expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date(today.getTime() +(expires));
    document.cookie = name + '=' + escape(value)
    +((expires) ? ';expires=' + expires_date.toGMTString() : '')
    +((path) ? ';path=' + path : '')
    +((domain) ? ';domain=' + domain : '')
    +((secure) ? ';secure' : '');
}
</script>

删除cookie

<script type="text/javascript">
function deleteCookie(name, path, domain){
    if(getCookie(name))
        document.cookie = name + '=' +((path) ? ';path=' + path : '')
        +((domain) ? ';domain=' + domain : '')
        + ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
}
</script>