function display(obj,id1,id2,id3,id4) 
	{
		txt = obj.options[obj.selectedIndex].value;
		document.getElementById('standaard').style.display = 'block';
		document.getElementById(id1).style.display = 'none';
		document.getElementById(id2).style.display = 'none';
		document.getElementById(id3).style.display = 'none';
		document.getElementById(id4).style.display = 'none';

		if ( txt.match(id1) ) 
		{
			document.getElementById(id1).style.display = 'block';
			document.getElementById('standaard').style.display = 'none';
		}
		
		if ( txt.match(id2) ) 
		{
			document.getElementById(id2).style.display = 'block';
			document.getElementById('standaard').style.display = 'none';
		}	
		
		if ( txt.match(id3) ) 
		{
			document.getElementById(id3).style.display = 'block';
			document.getElementById('standaard').style.display = 'none';
		}		
		
		if ( txt.match(id4) ) 
		{
			document.getElementById(id4).style.display = 'block';
			document.getElementById('standaard').style.display = 'none';
		}				
	}

	function appendTagTo(url) 
	{

		if (document.getElementById('soort').value == 'bedrijf1') 
		{		
			url += "bedrijf";			
			if (document.getElementById('sector1').value != "") url += '+' + document.getElementById('sector1').value;		
			if (document.getElementById('beurs1').value != "") url += '+' + document.getElementById('beurs1').value;	
			if (document.getElementById('jaar1').value != "") url += '+' + document.getElementById('jaar1').value;			
			
		}
		
		else if (document.getElementById('soort').value == 'goeddoel2') 
		{		
			url += "goeddoel";			
			if (document.getElementById('jaar2').value != "") url += '+' + document.getElementById('jaar2').value;	
		}
		
		else if (document.getElementById('soort').value == 'overheid3') 
		{		
			url += "overheid";		
			if (document.getElementById('sector3').value != "") url += '+' + document.getElementById('sector3').value;		
			if (document.getElementById('jaar3').value != "") url += '+' + document.getElementById('jaar3').value;	
		}		
		
		else if (document.getElementById('soort').value == 'zorginstelling4') 
		{		
			url += "zorginstellingen";			
			if (document.getElementById('sector4').value != "") url += '+' + document.getElementById('sector4').value;		
			if (document.getElementById('jaar4').value != "") url += '+' + document.getElementById('jaar4').value;	
		}			

		else 
		{	
			url += "bedrijf";
		}

		url += '/';
		return url;
	}

	function redirectTo(url, options) 
	{
		if(options.append_tag) 
		{
			window.location = appendTagTo(url);
		}
		
		else 
		{
			window.location = url;
		}				
		return true;
	}