menu11a = new Image(150,21); menu11a.src = "images/menu/menu11a.gif";
menu11b = new Image(150,21); menu11b.src = "images/menu/menu11b.gif";
menu12a = new Image(150,21); menu12a.src = "images/menu/menu12a.gif";
menu12b = new Image(150,21); menu12b.src = "images/menu/menu12b.gif";
menu13a = new Image(150,21); menu13a.src = "images/menu/menu13a.gif";
menu13b = new Image(150,21); menu13b.src = "images/menu/menu13b.gif";
menu14a = new Image(150,21); menu14a.src = "images/menu/menu14a.gif";
menu14b = new Image(150,21); menu14b.src = "images/menu/menu14b.gif";
menu15a = new Image(150,21); menu15a.src = "images/menu/menu15a.gif";
menu15b = new Image(150,21); menu15b.src = "images/menu/menu15b.gif";
menu16a = new Image(150,21); menu16a.src = "images/menu/menu16a.gif";
menu16b = new Image(150,21); menu16b.src = "images/menu/menu16b.gif";
menu21a = new Image(150,21); menu21a.src = "images/menu/menu21a.gif";
menu21b = new Image(150,21); menu21b.src = "images/menu/menu21b.gif";
menu22a = new Image(150,21); menu22a.src = "images/menu/menu22a.gif";
menu22b = new Image(150,21); menu22b.src = "images/menu/menu22b.gif";
menu23a = new Image(150,21); menu23a.src = "images/menu/menu23a.gif";
menu23b = new Image(150,21); menu23b.src = "images/menu/menu23b.gif";
menu24a = new Image(150,21); menu24a.src = "images/menu/menu24a.gif";
menu24b = new Image(150,21); menu24b.src = "images/menu/menu24b.gif";
menu25a = new Image(150,21); menu25a.src = "images/menu/menu25a.gif";
menu25b = new Image(150,21); menu25b.src = "images/menu/menu25b.gif";
menu26a = new Image(150,21); menu26a.src = "images/menu/menu26a.gif";
menu26b = new Image(150,21); menu26b.src = "images/menu/menu26b.gif";

function rollImg(imgName, state) {
	document.images[imgName].src = eval(imgName + state + ".src;")
}

function chkMailinglistForm() {
	errMsg = ""
	if(document.frmMailinglist.txtName.value=="") { errMsg += " - vul uw naam in\n" }
	if(document.frmMailinglist.txtEmail.value=="") { errMsg += " - vul uw e-mail adres in\n" }
	strEmail = document.frmMailinglist.txtEmail.value
	if (strEmail != "") {
		if (strEmail != '') {
			var checkOk	= "@."; 
			if ((strEmail.indexOf('@') == -1) || (strEmail.indexOf('.') == -1) || (strEmail.length<6)) {
				errMsg += " - het e-mail veld bevat geen geldig e-mail adres\n"
			} } }
	if(errMsg!="") {
		alert("De volgende fouten zijn opgetreden:\n\n" + errMsg + "\nProbeer het nogmaals.")
	} else {
		document.frmMailinglist.submit();
	}
}

function chkGuestbookForm() {
	errMsg = ""
	if(document.frmGuestbook.txtName.value=="") { errMsg += " - vul uw naam in\n" }
	strEmail = document.frmGuestbook.txtEmail.value
	if (strEmail != "") {
		var checkOk	= "@."; 
		if ((strEmail.indexOf('@') == -1) || (strEmail.indexOf('.') == -1) || (strEmail.length<6)) {
			errMsg += " - het e-mail veld bevat geen geldig e-mail adres\n"
		} } 
	if(document.frmGuestbook.txtMessage.value=="") { errMsg += " - vul een bericht in\n" }
	if(errMsg!="") {
		alert("De volgende fouten zijn opgetreden:\n\n" + errMsg + "\nProbeer het nogmaals.")
	} else {
		document.frmGuestbook.submit();
	}
}

function chkContactForm() {
	errMsg = ""
	if(document.frmContact.txtName.value=="") { errMsg += " - vul uw naam in\n" }
	if(document.frmContact.txtEmail.value=="") { errMsg += " - vul uw e-mail adres in\n" }
	strEmail = document.frmContact.txtEmail.value
	if (strEmail != "") {
		if (strEmail != '') {
			var checkOk	= "@."; 
			if ((strEmail.indexOf('@') == -1) || (strEmail.indexOf('.') == -1) || (strEmail.length<6)) {
				errMsg += " - het e-mail veld bevat geen geldig e-mail adres\n"
			} } }
	if(document.frmContact.txtSubject.value=="") { errMsg += " - vul een onderwerp in\n" }
	if(document.frmContact.txtMessage.value=="") { errMsg += " - vul een bericht in\n" }
	if(errMsg!="") {
		alert("De volgende fouten zijn opgetreden:\n\n" + errMsg + "\nProbeer het nogmaals.")
	} else {
		document.frmContact.submit();
	}
}