function initBlad(id)
{
	openBlad = document.getElementById(id);
	openBlad.style.display='';
}

function toonBlad(id)
{
	id = document.getElementById(id);
	id.style.display='';
	openBlad.style.display = 'none';
	openBlad = id;
}

/* nieuwe tabbladfuncties */

function initTab(p_id)
{
  if (!p_id) p_id = 0;
  if (openDiv = document.getElementById("b"+p_id))
    openDiv.style.display='';

  openTab = document.getElementById("t"+p_id);
  if (openTab) openTab.className='tab active';
}

function toonTab(p_id)
{
  if (openDiv)
  {
    openDiv.style.display = 'none';
    openTab.className = 'tab';
    id = document.getElementById("b"+p_id);
    id2 = document.getElementById("t"+p_id);
    id.style.display='';
    id2.className='tab active';
    openDiv = id;
    openTab = id2;
  }
}