function WN_open(psUrl,psName,piWidth,piHeight,piX,piY,pbNav)
{
   var loWndObj;
   if(psName == null)
      psName = 'UpdateWindow';
   if(piWidth == null)
      piWidth = 560;
   if(piHeight == null)
      piHeight = 450;
   if(piX == null)
      piX = 20;
   if(piY == null)
      piY = 20;
   if(pbNav == null)
      pbNav = 'no';
   loWndObj = window.open(psUrl,psName,'dependent=0,screenX='+piX+',screenY='+piY+',left='+piX+',top='+piY+',width='+piWidth+',height='+ piHeight+','+
                                       'toolbar='+pbNav+',menubar='+pbNav+',location='+pbNav+',statusbar=no,personalbar=no,locationbar='+pbNav+',directories=no,'+
                                       'scrollbars=yes,resizable=yes');
   loWndObj.focus();
}