var show_landingpages = 1;

	Event.observe(window, 'load', function () 
	{
		// initialize LandingPage navigation
		if ($('div_vt_gerelateerd') != undefined){
			
			// give the link a gonner! 
			$('related_pages').href = 'javascript: void(0);';
			
			// hiding the landingpage list on initialisation
			$('div_vt').className = 'lplist_hidden';
			$('div_vt_gerelateerd').innerHTML = '+';
			// set showed to zero
			show_landingpages = 0;			
			
			// hook the functions
			$('related_pages').observe('click', function()
			{
				// check if it's showing, if yes, hide it!
				if(show_landingpages == 1 )
				{
					$('div_vt').className = 'lplist_hidden';
					$('div_vt_gerelateerd').innerHTML = '+';
					// set showed to zero
					show_landingpages = 0;
				}
				else
				{
					$('div_vt').className = '';
					$('div_vt_gerelateerd').innerHTML = '-';
					// set showed to zero
					show_landingpages = 1;					
				}
			});
		}
	})
	


function switchDiv(id){
	span = document.getElementById('div_vt_gerelateerd');
	
	if (document.getElementById(id)){
			div = document.getElementById(id);
			if (div.className == 'vt'){
			div.className = 'vt_show';
			span.innerHTML = '–';
		}
		else {
			div.className = 'vt';
			span.innerHTML = '+';
		}
	}
}