// show and hide for the vertical menus and swaps the + - images

function swapMenu(newMenu,oldMenu) {
	// display new menu
	setStyleById('menu' + newMenu,'display','inline');
	// hide old menu
	setStyleById('menu' + oldMenu,'display','none');
	// display old menu linl
	setStyleById('mLink' + oldMenu,'display','inline');
	// hide new menu link
	setStyleById('mLink' + newMenu,'display','none');
	// set global var to newmenu
	dispMenu = newMenu;
}