function colunas() {
	var layout = document.getElementById('layout');
	var borda_conteudo = document.getElementById('borda_conteudo');
	var conteudo = document.getElementById('conteudo');
	conteudo.style.height = 'auto';
	var x = conteudo.offsetHeight;
	var y = x + 350;
	
	if (x > 480) {
		layout.style.height = y + "px";
		borda_conteudo.style.height = x + "px";
	} else { conteudo.style.height = 480 + "px"; }
}