//
// Function to pop up a new window.
// 

function popup_window(aURL, aWinName, h, w){
var wOpen
var sOptions
var iPosX
var iPosY
var iWinWidth
var iWinHeight
iWinWidth = screen.availWidth * w
iWinHeight = screen.availHeight * h
iPosX = (screen.availWidth / 2) - (iWinWidth / 2);
iPosY = (screen.availHeight / 2) - (iWinHeight /2);
sOptions = 'status=yes,menubar=no,scrollbars=yes,resizable=yes,toolbar=no';
sOptions = sOptions + ',width=' + iWinWidth.toString();
sOptions = sOptions + ',height=' + iWinHeight.toString();
sOptions = sOptions + ',screenX=' + iPosX.toString();
sOptions = sOptions + ',screenY=' + iPosY.toString();
sOptions = sOptions + ',left=' + iPosX.toString();
sOptions = sOptions + ',top=' + iPosY.toString();
wOpen = window.open( aURL, "_blank", sOptions );
wOpen.focus();
}