function speelzaal()
{window.open('speelzaal.htm','las5','width=600,height=450')}

function clubavond()
{window.open('clubavond.htm','las6','width=500,height=250')}

function hetbildt()
{window.open('http://users.bart.nl/~kdankert/page23.html','las7','width=800,height=600')}

function lont()
{window.open('Lont20021221.htm','las4','width=650,height=500,scrollbars=yes')}

function jordi()
{window.open('http://www.emanuellasker.tk/','denieuwelaskersite','width=800,height=600')}