function botaoHover(id1,id2)
{
	document.getElementById(id1).style.backgroundImage = "url(imagens/botao_hover.gif)";
	document.getElementById(id2).style.backgroundImage = "url(imagens/botao_hover.gif)";
}
function botaoOut(id1,id2)
{
	document.getElementById(id1).style.backgroundImage = "url(imagens/menu_center.gif)";
	document.getElementById(id2).style.backgroundImage  = "url(imagens/menu_center.gif)";
}