var win= null;
function openBW(theURL,winName,w,h,scroll,resize){
  var winl = (screen.width-w)/4;
  var wint = (screen.height-h)/4;
  var setting  ='height='+h+',';
      setting +='width='+w+',';
      setting +='top='+wint+',';
      setting +='left='+winl+',';
      setting +='scrollbars='+scroll+',';
      setting +='resizable='+resize+'';
  win=window.open(theURL,winName,setting);
  if(parseInt(navigator.appVersion) >= 4){win.focus();}
}