function fadeIn(divid) {
    opac = document.getElementById(divid).style.opacity * 100;
    document.getElementById(divid).style.display='block';
		if(opac < 100){
        opac+=10;
        
				fadeObj = document.getElementById(divid);
				fadeObj.style.opacity = opac/100;
				fadeObj.style.filter = 'alpha(opacity=' + opac + ')';
        
				setTimeout('fadeIn("'+divid+'")', 20);
    }
}

function fadeOut(divid) {
    opac2 = document.getElementById(divid).style.opacity * 100;
    
		if(opac2 > 0){
        opac2-=10;
        
				fadeObj = document.getElementById(divid);
				fadeObj.style.opacity = opac2/100;
				fadeObj.style.filter = 'alpha(opacity=' + opac2 + ')';
        
				setTimeout('fadeOut("'+divid+'")', 20);
    }
    else
    {
    	document.getElementById(divid).style.display='none';
    }
}

function switchSubTabs(newtabid)
{
	if (newtabid==1){oldtabid=2}
	if (newtabid==2){oldtabid=1}
	document.getElementById('subtab'+newtabid).className = 'submenuitem submenuitemactive';
	document.getElementById('subtab'+oldtabid).className = 'submenuitem';
	document.getElementById('pane'+newtabid).zIndex = 10;
	document.getElementById('pane'+oldtabid).zIndex = 9;
	fadeIn('pane'+newtabid);
	fadeOut('pane'+oldtabid);
}

var url = "index.php?action=";
function handleHttpResponse()
{
  if (http.readyState == 4) 
	{
    if(http.status==200) 
		{
      var results=http.responseText;
  		var update = new Array();
 
		  if(results.indexOf('||' != -1)) 
			{
		  	update = results.split('||');
		  	document.getElementById(update[0]).style.backgroundImage='url('+update[1]+')';
		  	document.getElementById(update[2]).innerHTML = update[3];
		  	document.getElementById(update[4]).innerHTML = update[5];
		  	document.getElementById(update[6]).innerHTML = update[7];
		  	document.getElementById('logo').style.top = update[9]+'px';
		  	document.getElementById('logo').style.left = update[11]+'px';
		  }
  	}
  }
}

function requestPage(page_id, cat) {
  	var curpage = "&pagina_id="+page_id+"&cat="+cat;
  	
      http.open("GET", url + 'get_page' + curpage, true);
      http.onreadystatechange = handleHttpResponse;
      http.send(null);
  }
  
  function getHTTPObject() {
    var xmlhttp;
  
    if(window.XMLHttpRequest){
      xmlhttp = new XMLHttpRequest();
    }
    else if (window.ActiveXObject)
    {
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
      if (!xmlhttp){
          xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    }
    return xmlhttp;
  }

var http = getHTTPObject();

function switch_fogo(){
	var balk = document.getElementById('balk').src;
	if(balk=="http://www.risselada.nl/newsite/img/balk_fo.png")
	{
		document.getElementById('balk').src = "img/balk_go.png";
	}
	else
	{
		document.getElementById('balk').src = "img/balk_fo.png";
	}
	var before_switch_pagina_id = document.getElementById('before_switch_pagina_id').value;
	if(before_switch_pagina_id>0)
	{
		var dummy_pagina_id = document.getElementById('pagina_id').value;
		document.getElementById('pagina_id').value = document.getElementById('before_switch_pagina_id').value;
		requestPage('getpage');
		
	}
	else
	{
		requestPage('fogo');
	}
	document.getElementById('before_switch_pagina_id').value = dummy_pagina_id;
}