function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

addLoadEvent(init_inschrijvingsformulier);

function init_inschrijvingsformulier() {
	var frmInschrijven = document.getElementById("inschrijvingsformulier");
	if(frmInschrijven) {
		frmInschrijven.onsubmit = validateInschrijven;
	}
	
	var lnkInschrijven = document.getElementById("inschrijvenLink");
	if(lnkInschrijven) {
		lnkInschrijven.onclick = function() {
			if(frmInschrijven.style.display == "block") {
				newVisibility = "none";
			} else {
				newVisibility = "block";
			}
			frmInschrijven.style.display = newVisibility;
			return false;
		}
	}
}

function validateInschrijven() {
	var theForm = document.getElementById("inschrijvingsformulier");

	var error = 0;
	var msg = "";

	if(theForm.bedrijf.value=="") {
		msg += "\n- " + lbl_inschr_bedrijf;
		error++;
	}
	if(theForm.naam.value=="") {
		msg += "\n- " + lbl_inschr_naam;
		error++;
	}
	if(theForm.telefoon.value=="") {
		msg += "\n- " + lbl_inschr_telefoon;
		error++;
	}
	if(theForm.email.value=="") {
		msg += "\n- " + lbl_inschr_email;
		error++;
	}
	
	if (error) {
		alert(lbl_inschr_verplicht + msg);
		return false;
	}
	if (!validateEmail(theForm.email.value)) {
		alert(lbl_inschr_geldig_email);
		return false;
	}
	
	return true;
}
function validateEmail(email) {
	
	if (email != null && email != "") {
		a = email.lastIndexOf("@");
		b = email.lastIndexOf(".");
		c = email.indexOf(":");
		d = email.indexOf("/");
		e = email.substring(0,a);
		f = e.indexOf("@");
		g = email.substring(a+1,email.length);
		h = g.indexOf("[");
		i = g.indexOf("]");
		j = g.indexOf("<");
		k = g.indexOf(">");
		l = email.substring(a+1,b);
		m = email.substring(b+1,email.length);
		n = email.substring(0,a);
		p = email.indexOf("'");
		q = email.indexOf("\"");
		o = 0;
		if (a > b) {o++};
		if (c != -1) {o++};
		if (d != -1) {o++};
		if (f != -1) {o++};
		if (h != -1) {o++};
		if (i != -1) {o++};
		if (j != -1) {o++};
		if (k != -1) {o++};
		if (l.length < 2) {o++};
		if (m.length < 2) {o++};
		if (n.length < 1) {o++};
		if (p != -1) {o++};
		if (q != -1) {o++};
		if (o != 0) {
			return false;
		}
	}
	return true;
}