function OpenWindow( sUri, iWidth, iHeight )
{
	var sWindowName = 'win' + Math.floor( Math.random()*1000 );
	var iRealWidth = iWidth ? iWidth : 600;
	var iRealHeight = iHeight ? iHeight : screen.height - 300;
	
	if(iRealWidth > screen.width) {
		iRealWidth = screen.width
	}
	
	if(iRealHeight > screen.height) {
		iRealHeight = screen.height;
	}

	var iLeft = Math.round( (screen.width-iRealWidth)/2 );
	var iTop =  Math.round( (screen.height-iRealHeight)/2 ) - 35;

	var sWindowOptions = 'status=no,menubar=yes,toolbar=no';
	sWindowOptions += ',resizable=yes,scrollbars=yes,location=no';
	sWindowOptions += ',width='  + iRealWidth;
	sWindowOptions += ',height=' + iRealHeight;
	sWindowOptions += ',left='   + iLeft;
	sWindowOptions += ',top='    + iTop;

	var oWindow = window.open( sUri, sWindowName, sWindowOptions );
	oWindow.focus();

	return oWindow;
}