function PopUp(theURL,winName,scrollbar,width,height) {
  var iMyWidth;
  var iMyHeight;
  iMyWidth = (window.screen.width/2); 
  iMyWidth= iMyWidth - (width/2)
  iMyHeight = (window.screen.height/2) ;
  iMyHeight= iMyHeight - (height/2);
  window.open(theURL,winName,scrollbar+",width="+width+",height="+height+",left="+iMyWidth+",top="+iMyHeight+",screenX="+iMyWidth+",screenY="+iMyHeight);
}