[转]js清除所有cookies

来源:http://blog.csdn.net/zzl1120/article/details/6592332

var cookies = document.cookie.split(";");
    for (var i = 0; i < cookies.length; i++) {
    	var cookie = cookies[i];
    	var eqPos = cookie.indexOf("=");
    	var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
    	document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
    }
if(cookies.length > 0)
{
    for (var i = 0; i < cookies.length; i++) {
    	var cookie = cookies[i];
    	var eqPos = cookie.indexOf("=");
    	var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
	var domain = location.host.substr(location.host.indexOf('.'));
    	document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/; domain=" + domain;
    }
}