function toggleLayer(demo) {
	if (document.getElementById) {
// this is the way the standards work
		var style2 = document.getElementById(demo).style;
		style2.display = style2.display? "":"block";
	} else if (document.all){
// this is the way old msie versions work
		var style2 = document.all[demo].style;
		style2.display = style2.display? "":"block";
	} else if (document.layers) {
// this is the way nn4 works
		var style2 = document.layers[demo].style;
		style2.display = style2.display? "":"block";
	}
}