function tabUser(elem) {
	document.getElementById('tab_user').style.display = 'block';
	document.getElementById('tab_affiliate').style.display = 'none';
	elem.className = 'enabled';
	elem.nextSibling.className = 'disabled';
}

function tabAffiliate(elem) {
	document.getElementById('tab_affiliate').style.display = 'block';
	document.getElementById('tab_user').style.display = 'none';
	elem.className = 'enabled';
	elem.previousSibling.className = 'disabled';
}