// JavaScript Document

function showtr(id)
{
	if(document.getElementById(id).style.display == 'none' && document.getElementById(id).style.visibility == 'hidden')
	{
		document.getElementById(id).style.display = '';
		document.getElementById(id).style.visibility = '';
	} 
	else 
	{
		document.getElementById(id).style.display = 'none';
		document.getElementById(id).style.visibility = 'hidden';
	}
}

/* Contactformulier */
function showct(id)
{
	if(id == 'conT1')
	{
		document.getElementById('conT1').style.display = '';
		document.getElementById('conT1').style.visibility = '';
		
		document.getElementById('conT2').style.display = 'none';
		document.getElementById('conT2').style.visibility = 'hidden';	
		
		document.getElementById('conT3').style.display = 'none';
		document.getElementById('conT3').style.visibility = 'hidden';	
		
		document.getElementById('conT4').style.display = 'none';
		document.getElementById('conT4').style.visibility = 'hidden';	
		
		document.getElementById('conT5').style.display = 'none';
		document.getElementById('conT5').style.visibility = 'hidden';	
	}
	else if(id == 'conT2')
	{
		document.getElementById('conT1').style.display = 'none';
		document.getElementById('conT1').style.visibility = 'hidden';
		
		document.getElementById('conT2').style.display = '';
		document.getElementById('conT2').style.visibility = '';	
		
		document.getElementById('conT3').style.display = 'none';
		document.getElementById('conT3').style.visibility = 'hidden';	
		
		document.getElementById('conT4').style.display = 'none';
		document.getElementById('conT4').style.visibility = 'hidden';	
		
		document.getElementById('conT5').style.display = 'none';
		document.getElementById('conT5').style.visibility = 'hidden';
	}
	else if(id == 'conT3')
	{
		document.getElementById('conT1').style.display = 'none';
		document.getElementById('conT1').style.visibility = 'hidden';
		
		document.getElementById('conT2').style.display = 'none';
		document.getElementById('conT2').style.visibility = 'hidden';	
		
		document.getElementById('conT3').style.display = '';
		document.getElementById('conT3').style.visibility = '';	
		
		document.getElementById('conT4').style.display = 'none';
		document.getElementById('conT4').style.visibility = 'hidden';	
		
		document.getElementById('conT5').style.display = 'none';
		document.getElementById('conT5').style.visibility = 'hidden';
	}
	else if(id == 'conT4')
	{
		document.getElementById('conT1').style.display = 'none';
		document.getElementById('conT1').style.visibility = 'hidden';
		
		document.getElementById('conT2').style.display = 'none';
		document.getElementById('conT2').style.visibility = 'hidden';	
		
		document.getElementById('conT3').style.display = 'none';
		document.getElementById('conT3').style.visibility = 'hidden';	
		
		document.getElementById('conT4').style.display = '';
		document.getElementById('conT4').style.visibility = '';	
		
		document.getElementById('conT5').style.display = 'none';
		document.getElementById('conT5').style.visibility = 'hidden';
	}
	else if(id == 'conT5')
	{
		document.getElementById('conT1').style.display = 'none';
		document.getElementById('conT1').style.visibility = 'hidden';
		
		document.getElementById('conT2').style.display = 'none';
		document.getElementById('conT2').style.visibility = 'hidden';	
		
		document.getElementById('conT3').style.display = 'none';
		document.getElementById('conT3').style.visibility = 'hidden';	
		
		document.getElementById('conT4').style.display = 'none';
		document.getElementById('conT4').style.visibility = 'hidden';	
		
		document.getElementById('conT5').style.display = '';
		document.getElementById('conT5').style.visibility = '';
	}
	else if(id == 'conT0')
	{
		document.getElementById('conT1').style.display = 'none';
		document.getElementById('conT1').style.visibility = 'hidden';
		
		document.getElementById('conT2').style.display = 'none';
		document.getElementById('conT2').style.visibility = 'hidden';	
		
		document.getElementById('conT3').style.display = 'none';
		document.getElementById('conT3').style.visibility = 'hidden';	
		
		document.getElementById('conT4').style.display = 'none';
		document.getElementById('conT4').style.visibility = 'hidden';	
		
		document.getElementById('conT5').style.display = 'none';
		document.getElementById('conT5').style.visibility = 'hidden';
	}	
}

<!-- BEGIN POPUP -->
var win=null;
function NewWindow(mypage,myname,w,h,pos,infocus){
if(pos=="random"){myleft=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;mytop=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){myleft=(screen.width)?(screen.width-w)/2:100;mytop=(screen.height)?(screen.height-h)/2:100;}
else if((pos!='center' && pos!="random") || pos==null){myleft=0;mytop=20}
settings="width=" + w + ",height=" + h + ",top=" + mytop + ",left=" + myleft + ",scrollbars=yes,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no,url=no";win=window.open(mypage,myname,settings);
win.focus();}
<!-- EINDE POPUP -->