function togglePrice() {	
	document.getElementById('sortPrice').style.display = 'block';
	document.getElementById('sortPrice').style.visibility = 'visible';
	document.getElementById('sortBrand').style.display = 'none';
	document.getElementById('sortBrand').style.visibility = 'hidden';	
}
function toggleBrand() {	
	document.getElementById('sortBrand').style.display = 'block';
	document.getElementById('sortBrand').style.visibility = 'visible';
	document.getElementById('sortPrice').style.display = 'none';
	document.getElementById('sortPrice').style.visibility = 'hidden';	
}