function menu1() { window.open ('http://www.tennisol.com') }
function menu2() { window.open ('http://www.tennisol.com') }
function menu3() { window.open ('http://www.tennisol.com') }
function menu4() { window.open ('http://www.tennisol.com') }
function menu5() { window.open ('http://www.tennisol.com') }
function menu6() { window.open ('http://www.tennisol.com') }