C#端平添的cookies，前台JS代码能删掉吗_ASP.NET

C#端添加的cookies，前台JS代码能删掉吗？

C# code

HttpCookie hcUser = new HttpCookie("User");            hcUser.Values.Add("username", Login1.UserName);            hcUser.Values.Add("password", Login1.Password);            hcUser.Expires = DateTime.Now.AddDays(30);            Response.Cookies.Add(hcUser);

JScript code

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';}

JScript code

function ExitClientClick(e) {    deleteCookie("User");}

我在JS的ExitClientClick里，想删掉这个cookies，不管用啊

------解决方案--------------------------------------------------------
改成这样是可以的

HttpCookie hcUser = new HttpCookie("User");
hcUser.Values.Add("username", "UserName");
hcUser.Values.Add("password", "Password");
hcUser.Expires = DateTime.Now.AddDays(30);
hcUser.HttpOnly = false;
hcUser.Path = "/";
Response.Cookies.Add(hcUser);

删除
function DelCookie(sName) {
document.cookie = sName + "=;expires=Thu, 26-Jul-2011 03:33:07 GMT; path=/;";
}