function toggleBox(divId) // 1 visible, 0 hidden
{
    if(document.getElementById)
    {
        var obj = document.getElementById(divId);
        var a = document.getElementById('viewdetailslink');
        
        if (obj.style.display == 'block') {
          obj.style.display='none';
          a.innerHTML = 'View clinical study details';
        }
        else
        { 
          obj.style.display='block';
          a.innerHTML = 'Hide clinical study details';
        }
    }
}