var openedMenu = '';

function ShowMenu(menuId) {
	HideMenu();
	var el = document.getElementById(menuId);
	if(el) { el.style.visibility = "visible"; }
	openedMenu = menuId;
}

function HideMenu() {
	if (openedMenu) { 
		if (document.getElementById(openedMenu)) { 
			document.getElementById(openedMenu).style.visibility = "hidden"; 
		}
	}
}

function rollItem(elementID, imagesPath, overORoff) { 
	image_type = (elementID.src).substring((elementID.src).length-3,(elementID.src).length);

	if( elementID.src.indexOf("_on") == -1 ) { // if the image is not selected
		the_path=''+imagesPath+elementID.name+'_'+overORoff+'.'+image_type;
		elementID.src=the_path;
	}	
}