function recht_zetten()
{
	afstand = (document.body.clientWidth / 2) - 490;
	if (afstand < 10)
	{
		document.getElementById("pagina").style.left = "10px";
		document.getElementById("pagina").style.margin = "0px";
	}
	else
	{
		document.getElementById("pagina").style.left = "50%";
		document.getElementById("pagina").style.margin = "0px 0px 0px -490px";
	}
	window.onresize = recht_zetten;
}