Web Forms :: Redirect To Different Page From Masterpage In C# ?

I have created button (btnOtherlink) in my masterpage (Customer.aspx) and redirect to different website [URL] when i click the button (btnOtherlink). But im unable view the website when i click the button because the url redirected become like this http://localhost:51713/www.emetrics.com instead of w[URL] . How to redirect the page to [URL] from my masterpage ?

And how to hide the url so that users didnt see the url when redirected to new page ?

My coding :-

protected void btnOtherlink_Click(object sender, EventArgs e)
{
Response.Redirect(www.emetrics.com);
}