function logoutUser() {
    deleteCookie("forum_login");
    deleteCookie("forum_password");
    deleteCookie("forum_author");
    document.location = "/";
    //alert('Cookie deleted');
    //alert(document.cookie);
}

function deleteCookie(name) {
    createCookie(name,"",-1);
}

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}