if (/msie/i.test (navigator.userAgent)) //only override IE
{
  document.nativeGetElementById = document.getElementById; 
  document.getElementById = function(id)
  {
    var elem = document.nativeGetElementById(id);
    if(elem)
    {
      //make sure that it is a valid match on id
      if(elem.attributes['id'].value == id)
      {
        return elem;
      }
      else
      {
        //otherwise find the correct element
        for(var i=1;i<document.all[id].length;i++)
        {
          if(document.all[id][i].attributes['id'].value == id)
          {
            return document.all[id][i];
          }
        }
      }
    }
    return null;
  }
}
function start(id,page){
	for ( var i=0; i < document.getElementById('uitklap').getElementsByTagName('div').length; i++ ) {
		var a = document.getElementById('uitklap').getElementsByTagName('div')[i];
		if ( a.className != 'preview' && a.className != 'items' ) {
			a.style.display = 'none';
		}
	}
	var preview = document.getElementById(id).getElementsByTagName('div');
	for ( var i=0; i < preview.length; i++){
		if(preview[i].className == 'preview'){
			var sub = preview[i].getElementsByTagName('a')[0].href.split('/');
			var sub = sub[4];
			if(sub == page){
				lightup(preview[i], 100);
				preview[i].className = 'preview current';
				num = i-1;
				document.getElementById(id).getElementsByTagName('li')[num].className = 'active';
			}
		}
	}
			
	document.getElementsByName(id)[0].className = 'active';
	document.getElementById(id).style.display = 'block';
}
function show(id,current) {
	var current = current;
	for ( var i=0; i < document.getElementById('uitklap').getElementsByTagName('div').length; i++ ) {
		var a = document.getElementById('uitklap').getElementsByTagName('div')[i];
		if ( a.className != 'preview' && a.className != 'items' ) {
			a.style.display = 'none';
		}
	}
	for ( var i=0; i < document.getElementById('tabs').getElementsByTagName('a').length; i++ ) {
		var a = document.getElementById('tabs').getElementsByTagName('a')[i];
		a.className = '';
	}
	current.className = 'active';
	document.getElementById(id).style.display = 'block';			
}
function highlight(id) {
	var max = id.parentNode.parentNode.getElementsByTagName('li').length;
	for ( var i=0; i < max; i++ ) {
		var a = id.parentNode.parentNode.getElementsByTagName('li')[i];
		var nummer = i+1;
		object = id.parentNode.parentNode.parentNode.getElementsByTagName('div')[nummer];
		if ( a == id ) {
			lightup(object, 100);
		}else{
			lightup(object, 20);
		}
	}
}
function lightup(imageobject, opacity){
	if (navigator.appName.indexOf("Netscape")!=-1&&parseInt(navigator.appVersion)>=5)
		imageobject.style.MozOpacity=opacity/100
	else if (navigator.appName.indexOf("Microsoft")!=-1&&parseInt(navigator.appVersion)>=4)
		imageobject.filters.alpha.opacity=opacity
}