window.switchProductTab = function(obj) {
	document.getElementById('tab_' + obj).className = 'active';
	document.getElementById('tab_' + (obj == 'offers' ? 'specs' : 'offers')).className = '';
	document.getElementById('table_' + (obj == 'offers' ? 'specs' : 'offers')).style.display = 'none';
	document.getElementById('table_' + obj).style.display = 'block';
}