// change menu classes
function change(id){
	if(id=='a'){
		document.getElementById('nav').className ='na';
	}
	if(id=='b'){
		document.getElementById('nav').className ='nb';
	}
	if(id=='c'){
		document.getElementById('nav').className ='nc';
	}
	if(id=='d'){
		document.getElementById('nav').className ='nd';
	}
	if(id=='e'){
		document.getElementById('nav').className ='ne';
	}
	if(id=='f'){
		document.getElementById('nav').className ='nf';
	}
}

function bck(){
	
	document.getElementById('nav').className ='na';
		
}

// swap images
function change_img(id){
	document.getElementById(id).src = "img/clientes/on/"+ id +".jpg";
}

// swap back
function change_ag(id){
	document.getElementById(id).src = "img/clientes/"+ id +".jpg";
}