function inicio(){
	document.getElementById("aba").style.visibility= "hidden";
	document.getElementById("port_list").style.visibility= "hidden";
	document.getElementById("port_big").style.visibility= "hidden";
	document.getElementById("quad").style.visibility= "hidden";
	document.getElementById("agencia").style.visibility= "hidden";
	document.getElementById("contato").style.visibility= "hidden";
	document.getElementById("obrigado").style.visibility= "hidden";
}
function agencia(){
	inicio();
	document.getElementById("quad").style.visibility= "visible";
	document.getElementById("agencia").style.visibility= "visible";
	
}
function contato(){
	inicio();
	document.getElementById("quad").style.visibility= "visible";
	document.getElementById("contato").style.visibility= "visible";
}
function obrigado(){
	inicio();
	document.getElementById("quad").style.visibility= "visible";
	document.getElementById("obrigado").style.visibility= "visible";
}
function port_list(){
	inicio();
	document.getElementById("quad").style.visibility= "visible";
	document.getElementById("port_list").style.visibility= "visible";
}