function LaunchPopUp(nameoffile,nameofwindowr,windowwidth,windowheight) 
              { 
              var PopUpTotalWidth = windowwidth; 
              var LeftPixel1 = ((screen.availWidth) - PopUpTotalWidth) / 2; 
              var PopUpTotalHeight = windowheight; 
              var TopPixel = ((screen.availHeight) - PopUpTotalHeight) / 2; 
              window.open(nameoffile,nameofwindowr,'top='+TopPixel+',screeny='+TopPixel+',left='+LeftPixel1+',screenx='+LeftPixel1+',width='+windowwidth+',height='+windowheight+',buttons=no,scrollbars=no,location=no,menubar=no,resizable=no,status=no,directories=no,toolbar=no');

}