function displayMenu( field) {

	//	Hide all menus
	if( document.getElementById( 'menu_styles').style.display != 'none') {
		document.getElementById( 'menu_styles').style.display = "none";
	}
	if( document.getElementById( 'menu_options').style.display != 'none') {
		document.getElementById( 'menu_options').style.display = "none";
	}
	if( document.getElementById( 'menu_uses').style.display != 'none') {
		document.getElementById( 'menu_uses').style.display = "none";
	}
	if( document.getElementById( 'menu_about').style.display != 'none') {
		document.getElementById( 'menu_about').style.display = "none";
	}

	//	Show selected menu
	if( field != 'none') {
		var updatefield = 'menu_' + field;
		if( document.getElementById( updatefield).style.display != 'block') {
			document.getElementById( updatefield).style.display = "block";
		}
	}
}