/***********************************************
 copyright : (C) 2006 - DesignBox                     
 Web: www.designbox.nl  Mail: info@designbox.nl 
 change date : 05 - 10 - 2010                   
 **********************************************/
 
/* verstuurformulieren */

function checkDatum(){
	if(document.forms[0].datum.value=="") {
		alert("Vul a.u.b. uw datum in.");
		document.forms[0].datum.focus();
		return false;
	} return true;
}

function checkNaam(){
	if(document.forms[0].naam.value=="") {
		alert("Vul a.u.b. uw naam in.");
		document.forms[0].naam.focus();
		return false;
	} return true;
}

function checkAantal(){
	if(document.forms[0].aantal.value=="") {
		alert("Vul a.u.b. het aantal personen in.");
		document.forms[0].aantal.focus();
		return false;
	} return true;
}

function isTelefoon(inField){
	var acceptable="0123456789 +-";
	var ok=true;
	for(i=0;i<inField.length;i++){
		if(acceptable.indexOf(inField.charAt(i).toUpperCase())==-1){
			ok=false;
			break;
		} 
	}
	return (ok);
}

function checkTelefoon() {
	if(document.forms[0].telefoon.value=="") {
		alert("Vul uw telefoonnummer in.");
		document.forms[0].telefoon.focus();
		return false;
	}
	if(!isTelefoon(document.forms[0].telefoon.value) || (document.forms[0].telefoon.value.length<10)) {
		alert("Het ingevoerde telefoonnummer is niet correct.");
		document.forms[0].telefoon.focus();
		return false;
	} return true;
}

function checkMail(){
	if(document.forms[0].email.value==""){
		alert("Vul uw email adres in.");
		document.forms[0].email.focus();
		return false;
		}
	if(document.forms[0].email.value.indexOf('@')==-1 || document.forms[0].email.value.indexOf('@')==0 || document.forms[0].email.value.indexOf('@')==(document.forms[0].email.value.length-1)){
		alert("Het ingevoerde email adres is niet correct.");
		document.forms[0].email.focus();
		return false;
	}
	if(document.forms[0].email.value.indexOf('.')==-1 || document.forms[0].email.value.indexOf('.')==0 || document.forms[0].email.value.indexOf('.')==(document.forms[0].email.value.length-1)){
		alert("Het ingevoerde email adres is niet correct.");
		document.forms[0].email.focus();
		return false;
	}
	return true;
}

//lesaanvraag
function verstuur(){
	if(!checkDatum()) return;
	if(!checkNaam()) return;
	if(!checkAantal()) return;
	if(!checkTelefoon()) return;
	if(!checkMail()) return;
	document.forms[0].action="aanvraag.php";
	document.forms[0].submit();
}