var newWin = null;
function popUp(strURL, strType, strHeight, strWidth) {
 if (newWin != null && !newWin.closed)
   newWin.close();
 
 var strOptions="";
 
 if (strType=="console")
   strOptions="resizable,height="+
     strHeight+",width="+strWidth+",directories=0,toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,left="+(screen.width/2-(strWidth/2))+",top="+(screen.height/2-(strHeight/2));
 
 if (strType=="fixed")
   strOptions="status,height="+
     strHeight+",width="+strWidth+",directories=0,toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,left="+(screen.width/2-(strWidth/2))+",top="+(screen.height/2-(strHeight/2));
 
 if (strType=="elastic")
   strOptions="toolbar,menubar,scrollbars,"+
     "resizable,location,height="+
     strHeight+",width="+strWidth+",directories=0,toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,left="+(screen.width/2-(strWidth/2))+",top="+(screen.height/2-(strHeight/2));
 
 newWin = window.open(strURL, 'newWin', strOptions);
 newWin.focus();
}