function abo() { window.open("http://www.gsmweb.nl/formdetail/vf/abo_tarief.htm","abo",",,,,,,,width=850,height=600,top=0,left=0,scrollbars=1,resizable=1"); }
function toestel() { window.open("http://www.gsmweb.nl/vodafone/toestelfeed.htm","toestel",",,,,,,,width=875,height=700,top=0,left=0,scrollbars=1,resizable=1"); }
function nummerbehoud() { window.open("http://www.gsmweb.nl/vodafone/nummerbehoud_popup.htm","nummerbehoud",",,,,,,,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"); }