js清除cookie源代码

如，我想在网页上设置按钮“清除cookie”，当点击此按钮后，就清除名为了test的cookie所有值！
 
 
function deleteCookie(name) {
  document.cookie = name+"=;expires="+(new Date(0)).toGMTString();
}
var Cookie=new Object();
Cookie.setCookie=function(name, value, option){
    var str=name+'='+escape(value);
    if(option){
        if(option.expireHours){
            var d=new Date();
            d.setTime(d.getTime()+option.expireHours*3600*1000);
            str+='; expires='+d.toGMTString();
        }
        if(option.path) str+='; path='+option.path;
        if(option.domain) str+='; domain='+option.domain;
        if(option.secure) str+='; true';
    }
    document.cookie=str;
}
Cookie.getCookie=function(name){
    var arr = document.cookie.split('; ');
    if(arr.length==0) return '';
    for(var i=0; i <arr.length; i++){
        tmp = arr[i].split('=');
        if(tmp[0]==name) return unescape(tmp[1]);
    }
    return '';
}
Cookie.delCookie=function(name){
    this.setCookie(name,'',{expireHours:-1});
}

/**How to use it
Cookie.setCookie('own','this is cookie test!');
alert(Cookie.getCookie('own'));
Cookie.delCookie('own');
alert(Cookie.getCookie('own'));
**/