var sw; var str; var Astr;
function openpopup(popurl, w, h){
 sw = 0; wi = 640; hi = 480;
 if(!!window.screen){
  ScreenWIDTH = screen.width;
 } else {
  ScreenWIDTH = 0;
 }
 if(!!window.screen){
  ScreenHEIGHT = screen.height;
 } else {
  ScreenHEIGHT = 0;
 }
 if(w <= ScreenWIDTH){
  Pwscr = (ScreenWIDTH - w) / 2;
 } else {
  sw = 1; w = wi;
 }
 if(h <= ScreenHEIGHT){
  Phscr = (ScreenHEIGHT - h) / 2;
 } else {
  sw = 1; h = hi;
 }
 if(sw){
  str = ",left=0,top=0,screenX=0,screenY=0,scrollbars,resizable";
 } else {
  str = ",left=" + Pwscr + ",top=" + Phscr + ",screenX=0,screenY=0,resizable";
 }
 Astr   = "width=" + w + ",height=" + h + str;
 subwin = window.open(popurl,'window1',Astr);
 if(sw){
  subwin.window.scrollTo(0, 0);
 }
}