function loadImage(image)
{
	document.getElementById('main_image').src=image;
}

function checkGuestbook()
{
	ok = true;
	
	document.getElementById('naam').style.border='#663300 1px solid';
	document.getElementById('bericht').style.border='#663300 1px solid';
	
	var naam = document.forms[0].naam.value;
	
	if(naam.length==0)
	{
		document.getElementById('naam').style.border='#FF0000 1px solid';
		ok = false;
	}
	
	var bericht = document.forms[0].bericht.value;
	
	if(bericht.length==0)
	{
		document.getElementById('bericht').style.border='#FF0000 1px solid';
		ok = false;
	}
	
	return ok;
}

function checkContact()
{
	ok = true;
	
	document.getElementById('naam').style.border='#663300 1px solid';
	document.getElementById('email').style.border='#663300 1px solid';
	document.getElementById('bericht').style.border='#663300 1px solid';
	
	var naam = document.forms[0].naam.value;
	
	if(naam.length==0)
	{
		document.getElementById('naam').style.border='#FF0000 1px solid';
		ok = false;
	}
	
	var email = document.forms[0].email.value;
	email_syntax = /^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/;
	
	if(email.length==0 || !email.match(email_syntax))
	{
		document.getElementById('email').style.border='#FF0000 1px solid';
		ok = false;
	}
	
	var bericht = document.forms[0].bericht.value;
	
	if(bericht.length==0)
	{
		document.getElementById('bericht').style.border='#FF0000 1px solid';
		ok = false;
	}
	
	return ok;
}