function popUp(id)
{
 win = window.open("alg_voorw.asp","Voorwaarden",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=500,height=500')
 win.moveTo((screen.width-500)/2,(screen.height-500)/2);
}

function popUpPakket(id)
{
 win = window.open("pakketten.asp","Pakketten",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=600,height=600')
 win.moveTo((screen.width-600)/2,(screen.height-600)/2);
}