var bIE = ( document.all ) ? true : false;
var bNN6 = ( !bIE && document.getElementById ) ? true : false;
var bNN4 = ( document.layers ) ? true : false;

function Popup( sName, sUri, iWidth, iHeight ) {
	var sPosition = "";
	if ( bNN4 || bNN6 || bIE ) {
		if ( (screen.height < 481) && (iHeight > 400) ) iHeight = 400;
		iX = Math.round( (screen.width - iWidth) / 2 );
		iY = Math.round( (screen.height - iHeight) / 2 );
		sPosition = ( bNN4 || bNN6) ? ",screenX=" + iX + ",screenY=" + iY : ",left=" + iX + ",top=" + iY;
	}
	oWindow = window.open( sUri, sName, "status=yes,menubar=no,toolbar=no,resizable=yes,scrollbars=no,location=no,width=" + iWidth + ",height=" + iHeight + sPosition);
	oWindow.focus();
	return false;
}