function selectTab(tab)
{
	// alert (tab)
	// eerste rij
	if (document.getElementById("nieuwsselected").style.display != "none")
	{
		document.getElementById("nieuwsselected").style.display = "none";
		document.getElementById("nieuws").style.display = "";
	}
	if (document.getElementById("over_deze_siteselected").style.display != "none")
	{
		document.getElementById("over_deze_siteselected").style.display = "none";
		document.getElementById("over_deze_site").style.display = "";
	}
	if (document.getElementById("etalageselected").style.display != "none")
	{
		document.getElementById("etalageselected").style.display = "none";
		document.getElementById("etalage").style.display = "";
	}
	if (document.getElementById("coachselected").style.display != "none")
	{
		document.getElementById("coachselected").style.display = "none";
		document.getElementById("coach").style.display = "";
	}
	if (document.getElementById("werkplekselected").style.display != "none")
	{
		document.getElementById("werkplekselected").style.display = "none";
		document.getElementById("werkplek").style.display = "";
	}
	// tweede rij
	if (document.getElementById("reflectieselected").style.display != "none")
	{
		document.getElementById("reflectieselected").style.display = "none";
		document.getElementById("reflectie").style.display = "";
	}
	if (document.getElementById("agendaselected").style.display != "none")
	{
		document.getElementById("agendaselected").style.display = "none";
		document.getElementById("agenda").style.display = "";
	}
	if ( document.getElementById("bronnenselected").style.display != "none")
	{
		document.getElementById("bronnenselected").style.display = "none";
		document.getElementById("bronnen").style.display = "";
	}
	if (document.getElementById("faqselected").style.display != "none")
	{
		document.getElementById("faqselected").style.display = "none";
		document.getElementById("faq").style.display = "";
	}
	if (document.getElementById("inspiratieselected").style.display != "none")
	{
		document.getElementById("inspiratieselected").style.display = "none";
		document.getElementById("inspiratie").style.display = "";
	}
	if (tab != "open")
	{
		document.getElementById(tab).style.display = "none";
		document.getElementById(tab + "selected").style.display = "";
	}
}

function loadKreten()
{
	xmlhttp = null
	// code for Mozilla, etc.
	if (window.XMLHttpRequest)
  	{
  		xmlhttp=new XMLHttpRequest()
  	}
	// code for IE
	else if (window.ActiveXObject)
  	{
  		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
  	}
	if (xmlhttp!=null)
  	{
	  	xmlhttp.onreadystatechange=onResponse;
  		xmlhttp.open("GET","kreten.xml",true);
  		xmlhttp.send(null);
  	}
	else
  	{
  		alert("Your browser does not support XMLHTTP.")
  	}
}

function checkReadyState(obj)
{
	if(obj.readyState == 4)
  	{
    		if(obj.status == 200)
    		{
      			return true;
    		}
    		else
    		{
      			//alert("Problem retrieving XML data " + obj.status + " " + obj.statusText);
      			return false;
    		}
  	}
}

function onResponse() 
{
	if(checkReadyState(xmlhttp))
  	{
  		response = xmlhttp.responseXML;
  		element = response.childNodes;
  		var thema = element[0].getAttribute("code");
  		//alert (thema);
  		document.getElementById('themaafb').src ="/portfoliogroenleren/themas/th_" + thema + ".gif"; 
		var kreten = element[0].childNodes;
		//alert (kreten.length);
		var id,actief,target;
		for (var i=0; i < kreten.length; i++)
		{
			id = kreten[i].getAttribute("ID");
			actief = kreten[i].getAttribute("actief");
			target = kreten[i].getAttribute("target");
			if (actief == "ja")
			{
				//alert (kreten[i].text);
				document.getElementById("kreet" + id).href = kreten[i].text;
				//alert (document.getElementById("kreet" + id).href);
				document.getElementById("kreet" + id).target = target;
			}
			else
			{
				if (document.getElementById("schoolbord" + id ).style.display != "none")
				{
					document.getElementById("schoolbord" + id).style.display = "none";
				}
			}
		}
  	}
  	//else
  	//{
  	//	document.getElementById('toc').innerHTML = "<p>Kreten bestand niet gevonden.</p>";
	//}	
}