function displayOn(section){
        if(section == 'related')
        {
            document.getElementById('kh_article').style.display = 'none';
            document.getElementById('kh_resources').style.display = 'none';
            document.getElementById('kh_related').style.display = 'block';
        }
        else if(section == 'resources')
        {
            document.getElementById('kh_article').style.display = 'none';
            document.getElementById('kh_resources').style.display = 'block';
            document.getElementById('kh_related').style.display = 'none';
        }
        else
        {
            document.getElementById('kh_article').style.display = 'block';
            document.getElementById('kh_resources').style.display = 'none';
            document.getElementById('kh_related').style.display = 'none';
        }
    
    }