// JavaScript Document

function fundo(item) {
	if (item == 1) {
		img = "url(images/molecula.jpg)";	
		bolha = document.getElementById("m_bolha");
		aparece = "visible"
	}
	else if (item == 2) {
		img = "url(images/lata.jpg)";
		bolha = document.getElementById("l_bolha");
		aparece = "visible"
	}
	else {
		img = "url(images/pb.jpg)";
		aparece = "hidden"
	}
	document.getElementById("corpo").style.backgroundImage = img;
	bolha.style.visibility = aparece;
}
function mostrasub(evento) {
	lista = document.getElementById("sub");
	if (evento == 1) {			
		lista.style.visibility = "visible";
		lista.style.height = "50px";
		document.getElementById("maior").style.width = "300px";
	}
	else {
		lista.style.visibility = "hidden";
		lista.style.height = "1px";
		document.getElementById("maior").style.width = "150px";
	}
}