if (document.layers) {  // Netscape

	layerRef="document.layers";

	styleRef="";

	visibleVar='"show"';

	hiddenVar='"hide"';



} else if (document.all) {  // IE

	layerRef="document.all";

	styleRef=".style";

	visibleVar='"visible"';

	hiddenVar='"hidden"';

}





function checkLayers(count) {

	if (document.all) {

		for (var i = 1; i < count; i++) {

			if ( ! eval('document.all.menu'+i) ) {

//				alert('document.all.menu'+i)

				return false

			}

		}

	}

	return true

}



function showsubmenu0(){

	if (!checkLayers(2)) return false;

	eval(layerRef+'.submenu1'+styleRef+'.visibility = '+hiddenVar+';');

	eval(layerRef+'.submenu2'+styleRef+'.visibility = '+hiddenVar+';');

}

function showsubmenu1(){

	if (!checkLayers(2)) return false;

	eval(layerRef+'.submenu1'+styleRef+'.visibility = '+visibleVar+';');

	eval(layerRef+'.submenu2'+styleRef+'.visibility = '+hiddenVar+';');

}

function showsubmenu2(){

	if (!checkLayers(2)) return false;

	eval(layerRef+'.submenu1'+styleRef+'.visibility = '+hiddenVar+';');

	eval(layerRef+'.submenu2'+styleRef+'.visibility = '+visibleVar+';');

}