function Troca(item){

	switch(item){

	case 'voltar': 
		document.voltar.src = image1.src
	break;
	
	case 'topo': 
		document.topo.src = image3.src
	break;
	
	case 'comprar': 
		document.comprar.src = image5.src
	break;
	
	case 'limpar': 
		document.limpar.src = image7.src
	break;
	
	case 'saiba': 
		document.saiba.src = image9.src
	break;
	
	case 'saiba1': 
		document.saiba1.src = image9.src
	break;
	
	case 'novidades': 
		document.novidades.src = image11.src
	break;
	
	case 'enviar': 
		document.enviar.src = image13.src
	break;
	}


}

function TrocaOff(item){

	switch(item){

	case 'voltar': 
		document.voltar.src = image2.src
	break;
	
	case 'topo': 
		document.topo.src = image4.src
	break;
	
	case 'comprar': 
		document.comprar.src = image6.src
	break;
	
	case 'limpar': 
		document.limpar.src = image8.src
	break;
	
	case 'saiba': 
		document.saiba.src = image10.src
	break;
	
	case 'saiba1': 
		document.saiba1.src = image10.src
	break;
	
	case 'novidades': 
		document.novidades.src = image12.src
	break;
	
	case 'enviar': 
		document.enviar.src = image14.src
	break;
	}

}

//Preload das Imagens do Menu

image1 = new Image()
image1.src ="../../img/bt_voltar_over.gif"

image2 = new Image()
image2.src ="../../img/bt_voltar.gif"

image3 = new Image()
image3.src ="../../img/bt_topo_over.gif"

image4 = new Image()
image4.src ="../../img/bt_topo.gif"

image5 = new Image()
image5.src ="../../img/bt_comprar_over.gif"

image6 = new Image()
image6.src ="../../img/bt_comprar.jpg"

image7 = new Image()
image7.src ="../../img/bt_limpar_over.gif"

image8 = new Image()
image8.src ="../../img/bt_limpar.jpg"

image9 = new Image()
image9.src ="../../img/bt_saiba_over.jpg"

image10 = new Image()
image10.src ="../../img/bt_saiba.jpg"

image11 = new Image()
image11.src ="../../img/bt_novidades_over.jpg"

image12 = new Image()
image12.src ="../../img/bt_novidades.jpg"

image13 = new Image()
image13.src ="../../img/bt_enviar_over.gif"

image14 = new Image()
image14.src ="../../img/bt_enviar.gif"