function ow(url,myWidth,myHeight,myWin){

  if(!myWidth ) myWidth=640
  if(!myHeight) myHeight=300
  if(!myWin   ) myWin='_blank'
  myWin=window.open( url,myWin,"resizable=yes,scrollbars=yes,width="+myWidth+",height="+myHeight);
  myWin.focus();
}