var newWin = null; 
function popUp(strURL, strType, strWidth, strHeight ) { 
 if (newWin != null && !newWin.closed) 
   newWin.close(); 
 var strOptions=""; 
 if (strType=="console") 
   strOptions="resizable,width="+ 
     strWidth+",height="+strHeight; 
 if (strType=="fixed") 
   strOptions="status,width="+ 
     strWidth+",height="+strHeight; 
 if (strType=="elastic") 
   strOptions="toolbar,menubar,scrollbars,"+ 
     "resizable,location,width="+ 
     strWidth+",height="+strHeight; 
 newWin = window.open(strURL, 'newWin', strOptions); 
 newWin.focus(); 
}