function mypopup() {
   mywindow = window.open ("vercode.html", "mywindow", "location=0, status=0, scrollbars=1, width=300, height=250");
   mywindow.moveTo(0,0);
} 
function hvacpopup() {
   mywindow = window.open ("hvac.html", "mywindow", "location=0, status=0, scrollbars=1, width=500, height=300");
   mywindow.moveTo(0,0);
} 
function ductpopup() {
   mywindow = window.open ("duct.html", "mywindow", "location=0, status=0, scrollbars=1, width=500, height=300");
   mywindow.moveTo(0,0);
}