// JavaScript Document
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function submit_onclick_form(obj){
	var msg='';
	var form=document.getElementById(obj);	
	var el = form.getElementsByTagName('label');

	for(i=0;i<form.elements.length;i++){	
		if(form.elements[i].id!='' && form.elements[i].title!=''){
			if(form.elements[i].owner!=undefined && form.elements[i].owner!=''){ //if form element contains owner attribute
				if(document.getElementById(form.elements[i].owner).style.display!='none'){ //then only check if shown
					msg = msg + chckField(form.elements[i],form.elements[i].title)
				}
			}else{
				msg = msg + chckField(form.elements[i],form.elements[i].title)
			}
		}
	}
	for (var e=0; e<el.length; e++) { //check for radio/checkboxes
		var objLabel = el[e];
		var domLabel = document.getElementById(objLabel.getAttribute('id'));
		var domLabelText = document.getElementById(objLabel.getAttribute('id')).innerHTML;
		var id_1 = domLabel.id.replace('lbl','')

		var spanObj = document.getElementById(id_1+'_group');
		var radio_checked1 = false;
		var radio_result = '';

		var allInputTags = spanObj.getElementsByTagName('INPUT');
		for (var c=0; c<allInputTags.length; c++) {
			if (allInputTags[c].checked) {
				radio_checked1 = true;
				radio_result = allInputTags[c].value;
				break;
			}
		}
		if(!radio_checked1) {
			msg=msg + '- '+allInputTags[0].title +'\n';
		}	
	}
	if(msg!='') {
		alert("De volgende velden zijn verplicht:\n" + msg);
		return false;
	}	else {
	 	form.submit();
	}
}

//place your checks here please
function chckField(obj,title) {
	var err = ''
	var globalCheck = true
	if (obj.id.indexOf('email')>-1 && obj.value!=''){
		globalCheck = false
		if (!isEmail(obj.value)){
			err = err + "- Het emailadres is niet correct\n"  
			errorLayout(obj,false);
		}else{
			errorLayout(obj,true);
		}
	}
	if (obj.id.indexOf('_tel')>-1 && obj.value!=''){
		globalCheck = false
		if (obj.value.length<10){
			err = "- Een telefoonnummer dient 10 tekens lang te zijn\n"
			errorLayout(obj,false);
		}else{
			errorLayout(obj,true);
		}
	}
	if (obj.id.indexOf('DD')>-1 && obj.value!=''){
		globalCheck = false
		if (!isDate(obj.value+'-'+document.getElementById(obj.id.replace('DD','MM')).value+'-'+document.getElementById(obj.id.replace('DD','YY')).value)){
			err = err + "- "+obj.title+" incorrect\n"  
			errorLayout(obj,false);
			errorLayout(document.getElementById(obj.id.replace('DD','MM')),false);
			errorLayout(document.getElementById(obj.id.replace('DD','YY')),false);
		}else{
			errorLayout(obj,true);
			errorLayout(document.getElementById(obj.id.replace('DD','MM')),true);
			errorLayout(document.getElementById(obj.id.replace('DD','YY')),true);
		}
	}
	if(globalCheck) {
		if(obj.value=='' || obj.value==obj.title){
			err = "- " + title + "\n";
			errorLayout(obj,false);
			}
		else {
			errorLayout(obj,true);
		}
	}
	return err
}

function errorLayout(obj,ok){ //set colors submit_onclick form if error
	if(ok){
		obj.style.backgroundColor = "#FFFFFF";
		obj.style.color = "#333333";
	}else{
		obj.style.backgroundColor = "#EEEEEE";
		obj.style.color = "#333333";
	}
}

function isEmail(string) {
	if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
		return true;
	else
		return false;
}

function isNumberKey(e) {
	var k;
	document.all ? k = e.keyCode : k = e.which;
	return ((k > 47 && k < 58 || k == 46 || k == 8));
}

function isTelefoon(obj,e) {
	var k;
	document.all ? k = e.keyCode : k = e.which;
	if(obj.value.length<10){
		return ((k > 47 && k < 58 || k == 46 || k == 8));
	}else{
		alert('Een telefoonnummer kan max. 10 cijfers lang te zijn.')
	}
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var arrDate = dtStr.split(dtCh)
	strDay=arrDate[0]
	strMonth=arrDate[1]
	strYear=arrDate[2]
	if(strDay.length>0 && strMonth.length>0 && strYear.length>0) {
		month=parseInt(strMonth)
		day=parseInt(strDay)
		year=parseInt(strYear)
		if (day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || (day > daysInMonth[month] || daysInMonth[month]==undefined ) || (strYear.length<4)  ){
			return false
		}
		return true
	}else{
		return false
	}
}