function openBannerWindow() {
	bannerWindowWidth=700;
	bannerWindowHeight=420;

	bannerWindowPositionLeft = ( screen.width / 2 ) - (  bannerWindowWidth / 2 );
	bannerWindowPositionTop = ( screen.height / 2 ) - (  bannerWindowHeight / 2 );

	temp_exec = "window.open( '/html/popup_banner.html', '', 'width=" + bannerWindowWidth + ",height=" + 
		bannerWindowHeight +",left=" + bannerWindowPositionLeft + ",top=" +
		bannerWindowPositionTop + ",screenX=" + bannerWindowPositionLeft + ",screenY=" +
		bannerWindowPositionTop + "' );";
	eval( temp_exec );
}