var windowDoPop
function go(whichURL) {
    windowDoPop=window.open(whichURL[whichURL.selectedIndex].value,'doPop','dependent=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=300,height=400,screenX=50,screenY=50');
    windowDoPop.focus();
}