var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_home_o = newImage('images/home_o.jpg');
		pre_wie_o = newImage('images/wie_o.jpg');
		pre_werkwijze_o = newImage('images/werkwijze_o.jpg');
		pre_toepassingen_o = newImage('images/toepassingen_o.jpg');
		pre_referenties_o = newImage('images/referenties_o.jpg');
		pre_contact_o = newImage('images/contact_o.jpg');
		preloadFlag = true;
	}
}