    <!--
    if (top.frames.length != 0) {
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function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		over1 = newImage("image/over1.gif");
		over2 = newImage("image/over2.gif");
		wellness1 = newImage("image/wellness1.gif");
		wellness2 = newImage("image/wellness2.gif");
		ondernemer_worden1 = newImage("image/ondernemer_worden1.gif");
		ondernemer_worden2 = newImage("image/ondernemer_worden2.gif");
		feiten_en_cijfers1 = newImage("image/feiten_en_cijfers1.gif");
		feiten_en_cijfers2 = newImage("image/feiten_en_cijfers2.gif");
		artikelen1 = newImage("image/artikelen1.gif");
		artikelen2 = newImage("image/artikelen2.gif");
		kalender1 = newImage("image/kalender1.gif");
		kalender2 = newImage("image/kalender2.gif");
		winkel1 = newImage("image/winkel1.gif");
		winkel2 = newImage("image/winkel2.gif");
		faq1 = newImage("image/faq1.gif");
		faq2 = newImage("image/faq2.gif");
		contact1 = newImage("image/contact1.gif");
		contact2 = newImage("image/contact2.gif");
		weightloss1 = newImage("image/weightloss1.gif");
		weightloss2 = newImage("image/weightloss2.gif");
		sport_and_fitness1 = newImage("image/sport_and_fitness1.gif");
		sport_and_fitness2 = newImage("image/sport_and_fitness2.gif");
		preventive_nutrition1 = newImage("image/preventive_nutrition1.gif");
		preventive_nutrition2 = newImage("image/preventive_nutrition2.gif");
		health_and_beauty1 = newImage("image/health_and_beauty1.gif");
		health_and_beauty2 = newImage("image/health_and_beauty2.gif");
		mental_fitness1 = newImage("image/mental_fitness1.gif");
		mental_fitness2 = newImage("image/mental_fitness2.gif");	
		preloadFlag = true;
	}
}

function checkFields() {
missinginfo = "";
if ((document.form.email.value == "") || 
(document.form.email.value.indexOf('@') == -1) || 
(document.form.email.value.indexOf('.') == -1)) {
missinginfo += "\n     -  Emailadres";
}
if (document.form.naam.value == "") {
missinginfo += "\n     -  Naam";
}
if (document.form.telefoonnummer.value == "") {
missinginfo += "\n     -  Telefoonnummer";
}

if (missinginfo != "") {
missinginfo ="_____________________________\n" +
"U heeft het volgende niet ingevuld:\n" +
missinginfo + "\n_____________________________" +
"\nU kunt dit alsnog doen!";
alert(missinginfo);
return false;
}
else return true;
}



//-->