// JavaScript Document
var bMouseOver = true;
	 
browserName = navigator.appName;
browserVersion = parseInt (navigator.appVersion);
if (browserName == "Microsoft Internet Explorer"  && browserVersion < 4)
{
 	bMouseOver = false;
}
function  img_act(imgName) {
	if (bMouseOver) {		
		imgOn = eval(imgName + "on.src");
		document [imgName].src = imgOn;
	}
}

function img_inact(imgName) {
	if (bMouseOver) {
		imgOff = eval(imgName + "off.src");
		document [imgName].src = imgOff;
	}
}



function checkEmailForm(element, value){
	if(element.naam.value == ''){
		alert("Vul uw naam in.");
		element.naam.focus();
		return false;	
	} else if(element.adres.value == ''){
		alert("Vul uw adres in.");
		element.adres.focus();
		return false;
	} else if(element.postcode.value == ''){
		alert("Vul uw postcode in.");
		element.postcode.focus();
		return false;
	} else if(element.plaats.value == ''){
		alert("Vul uw plaats in.");
		element.plaats.focus();
		return false;
} else if(element.email.value == '' || element.email.value == value){
		alert("Vul een e-mailadres in.");
		element.email.focus();
		element.email.value = '';
		return false;
	} else if(element.email.value.indexOf ('@',0) == -1 || element.email.value.indexOf ('.',0) == -1){
		alert("Vul een geldig e-mailadres in.");
		element.email.focus();
		element.email.value = element.email.value;
		return false;		
	} else if(element.vragen.value == ''){
		alert("Vul uw vraag of opmerking in.");
		element.vragen.focus();
		return false;		
	} else {
		return true;
	} // if
} // function checkEmailForm



function checkEmail(element, value){
if(element.email.value == '' || element.email.value == value){
		alert("Vul een e-mailadres in.");
		element.email.focus();
		element.email.value = '';
		return false;
} else if(element.email.value.indexOf ('@',0) == -1 || element.email.value.indexOf ('.',0) == -1){
		alert("Vul een geldig e-mailadres in.");
		element.email.focus();
		element.email.value = element.email.value;
		return false;		
}else {
		return true;
	} // if
} // function checkEmail