function validateFields(form){
	var canSend = true;
	
	var usernameElement = form.elements[1];
	var username= form.elements[1].value;
	var passElement = form.elements[2];

	var pass= form.elements[2].value;
	
	if(username == 'Username'){
		usernameElement.style.color='#FF0000';
		canSend=false;
	}
	if(pass == 'Password'){
		passElement.style.color='#FF0000';
		canSend=false;
	}
	if(!canSend)
		alert('Por favor insira os seus dados!');

	
	return canSend;
}

function validateFieldsNewsletter(form){
	var canSend = true;
	
	var nameElement = form.elements[1];
	var name= form.elements[1].value;
	var emailElement = form.elements[2];

	var email= form.elements[2].value;
	
	if(name == 'Nome'){
		nameElement.style.color='#FF0000';
		canSend=false;
	}
	if(email == 'Email'){
		emailElement.style.color='#FF0000';
		canSend=false;
	}
	if(!canSend)
		alert('Por favor insira os seus dados!');

	
	return canSend;
}

function redirect_brand(sel){
	var idBrand = sel.options[sel.selectedIndex].value;
	window.location="/brands/edit_brand/"+idBrand;

}

function filter_model_new(id,sel){
	var idBrand = sel.options[sel.selectedIndex].value;
	window.location="/news/view_models/"+id+"?model_name="+idBrand;
}

function filter_model_used(id,sel){
	var idBrand = sel.options[sel.selectedIndex].value;
	window.location="/useds/view_models/"+id+"?model_name="+idBrand;
}