function changeTab(src){
	
	var secs = ['news','advices','services'];
	for (var sec in secs) document.getElementById(secs[sec]).className = 'hidden';

	var tabs = ['newsbtn','tutsbtn','servsbtn'];
	for (var tab in tabs) document.getElementById(tabs[tab]).firstChild.className = '';
	
	var name = src.href.substr(src.href.lastIndexOf('#')+1);
	document.getElementById(name).className = '';
	
	src.className = 'active';
	
	return false;
}

function openTab(src){
	var content = src.parentNode.parentNode.getElementsByTagName('div')[0];
	content.className = content.className==''?'hidden':'';
	return false;
}

function openFaq(src){
	var content = src.parentNode.parentNode.getElementsByTagName('p')[0];
	content.className = content.className==''?'hidden':'';
	return false;
}