function addEvento(objeto,evento,funcao){
	if(objeto.addEventListener){
		objeto.addEventListener(evento,funcao,false);   
	}else if(objeto.attachEvent){
		objeto.attachEvent("on"+evento,funcao);
	}
}
function entrou_email(){
	var obj=document.getElementById("newsletter");
	document.getElementById("newsletter").style.background="#303030";
}
function saiu_email(){
	var obj=document.getElementById("newsletter");
	if(obj.value==""){
		obj.style.background="url(arquivos/rodape_email.gif) no-repeat #303030";
	}
}
function entrou_busca(){
	var obj=document.getElementById("busca");
	document.getElementById("busca").style.background="#fff";
}
function saiu_busca(){
	var obj=document.getElementById("busca");
	if(obj.value==""){
		obj.style.background="url(arquivos/menubg.gif) no-repeat #fff";
	}
}
function envia_busca(){
	document.getElementById("form_busca").submit();
}
function envia_newsletter(){
	document.getElementById("form_newsletter").submit();
}
function envia_contato(){
	document.getElementById("contato").submit();
}
function troca(obj){
	window.location="produtos.php?id="+obj.value;
}