var navClicked = false;
function nav(page, keywords, params, direction, totalItems, sort){
	if(navClicked == false){
		navClicked = true;
		if (document.getElementById('btnNext')) document.getElementById('btnNext').disabled = true;
		if (document.getElementById('btnBack')) document.getElementById('btnBack').disabled = true;
		url = "webshop.asp?act=catalog&page="+page+"&direction="+direction+"&keywords="+keywords+""+params+"&totalItems="+totalItems+"&sort="+sort;
	
		document.location.href = url;
	}
}
function navthema(page, keywords, params, direction, totalItems, sort, thema){
	if(navClicked == false){
		navClicked = true;
		if (document.getElementById('btnNext')) document.getElementById('btnNext').disabled = true;
		if (document.getElementById('btnBack')) document.getElementById('btnBack').disabled = true;
		url = "webshop.asp?act=catalog&view=sub&page="+page+"&direction="+direction+"&keywords="+keywords+""+params+"&totalItems="+totalItems+"&sort="+sort+"&cat="+thema;
	
		document.location.href = url;
	}
}
function calcHeight()
{
  var the_height = document.getElementById('externalframe').contentWindow.document.body.scrollHeight;

  document.getElementById('externalframe').height= the_height;
}