// JavaScript Document
function stijn(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_stijn.gif)";
}
function thu(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_thu.gif)";
}
function diablo(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_diablo.gif)";
}
function ghinzu(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_ghinzu.gif)";
}
function tiga(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_tiga.gif)";
}
function garnier(){
document.getElementById('bg').style.backgroundImage = "url(images/bg_garnier.gif)";
}
function magic(){
document.getElementById('magic').style.display = "block";
}
function magicoff(){
document.getElementById('magic').style.display = "none";
}

// form validator
function formValidation(form)
	{
	if (bpl7.email.value == "" || 
	bpl7.email.value.indexOf('.', '@', 0) == -1)
		{ 
		alert("E-mailadres is niet geldig");
		return false;
  		}
	else if(notEmpty(bpl7.email))
		{
   		return true;
   		}
  	else
  		{
		return false;
		}
 	}
//Lege velden
function notEmpty(elem)
	{
	var str = elem.value;
	if(str.length == 0)
		{
		alert("U dient alle velden in te vullen");
		return false;
		} else {
		return true;
		}
	}