function SwitchImg()
{ //start
  var rem, keep=0, store, obj, switcher=new Array, history=document.Data;
    for (rem=0; rem < (SwitchImg.arguments.length-2); rem+=3) {
    	store = SwitchImg.arguments[(navigator.appName == 'Netscape')?rem:rem+1];
    if ((store.indexOf('document.layers[')==0 && document.layers==null) ||
        (store.indexOf('document.all[')==0 && document.all==null))
         store = 'document'+store.substring(store.lastIndexOf('.'),store.length);
         obj = eval(store);
    if (obj != null) {
   	   switcher[keep++] = obj;
      switcher[keep++] = (history==null || history[keep-1]!=obj)?obj.src:history[keep];
      obj.src = SwitchImg.arguments[rem+2];
  } }
  document.Data = switcher;
} //end

function RestoreImg()
{ //start
  if (document.Data != null)
    for (var rem=0; rem<(document.Data.length-1); rem+=2)
      document.Data[rem].src=document.Data[rem+1];
} //end

var isNS4 = (document.layers) ? true : false;
var isIE4 = (document.all && !document.getElementById) ? true : false;
var isIE5 = (document.all && document.getElementById) ? true : false;
var isNS6 = (!document.all && document.getElementById) ? true : false;

function fnGetElement(strElementId)
{
  if (isNS4)
    return document.layers[strElementId];
  else if (isIE4)
    return document.all[strElementId];
  else if (isIE5 || isNS6)
    return document.getElementById(strElementId);
  else
    return document.getElementById(strElementId);
}

function fnMenuShowSubCategories(intCategoryId)
{
	if (fnGetElement("divMenuCategory" + intCategoryId).style.display == "none")
	{
		fnGetElement("divMenuCategory" + intCategoryId).style.display = "block";
		fnGetElement("imgMenuCategory" + intCategoryId).src = "media/navigatie/menu_open.gif";
	}
}

function fnMenuHideSubCategories(intCategoryId, intActiveCategoryId)
{
	if (intCategoryId != intActiveCategoryId && fnGetElement("divMenuCategory" + intCategoryId).style.display == "block")
	{
		fnGetElement("divMenuCategory" + intCategoryId).style.display = "none";
		fnGetElement("imgMenuCategory" + intCategoryId).src = "media/navigatie/menu_closed.gif";
	}
}