function abo() { window.open("http://www.gsmweb.nl/formdetail/tmip/abo_tarief.htm","abo",",,,,,,,width=750,height=500,top=0,left=0,scrollbars=1,resizable=1"); }
function nbtm() { window.open("http://www.gsmweb.nl/tmobile/tmobile_nummerbehoud_popup.htm","nbtm",",,,,,,,width=640,height=675,top=0,left=0,scrollbars=1,resizable=1"); }
function tv() { window.open("http://www.gsmweb.nl/verzekering_popup.htm","tv",",,,,,,,width=640,height=800,top=0,left=0,scrollbars=1,resizable=1"); }
function toestel() { window.open("http://www.gsmweb.nl/tmobile/toestelfeed_ip.htm","toestel",",,,,,,,width=975,height=700,top=0,left=0,scrollbars=1,resizable=1"); }