使用Javascript設置，獲取和刪除cookie

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() : '' ) + //expires.toGMTString()
        ((path) ? ';path=' + path : '' ) +
        ((domain) ? ';domain=' + domain : '' ) +
        ((secure) ? ';secure' : '' );
}

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));
}
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';
}
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