var n4 = (document.layers) ? 1 : 0;
var ie = (document.all) ? 1 : 0;
var n6 = (document.getElementById && ! document.all) ? 1 : 0;
var plusN6 = 10;
function popup(page,width,height)
{
 if ( width == 0 )
 {
  var windowWidth = screen.width/2;
 }
 else
 {
  var windowWidth = width;
 }
 if ( height == 0 )
 {
  var windowHeight = screen.height/2;
 }
 else
 {
  var windowHeight = height;
 }
 if ( n6 )
 {
  windowHeight = windowHeight + plusN6;	
 } 
 var windowLeft = (screen.width-windowWidth)/2;
 var windowTop  = (screen.height-windowHeight)/2;
  var windowLeft = 0;
 var windowTop  = 0;
 w = window.open(page,'PAGE','status=yes,resizable=no,scrollbars=yes,fullscreen=no,width='+windowWidth+',height='+windowHeight+',top='+windowTop+',left='+windowLeft+' ');
}