function showToC() {
	if (top.section) {
		// Standard frame layout
		var fs=top.section.mainFrameSet;
		if (fs!=null)
			fs.cols=top.section.strColumns_Current;
		top.section.band.document.getElementById("showPanel").style.display="none";
	}
	else if (top.mainFrameSet) {
		// Publication preview frame layout
		var fs=top.mainFrameSet;
		if (fs!=null)
			fs.cols=top.strColumns_Current;
		top.band.document.getElementById("showPanel").style.display="none";
	}
}