// JavaScript Document

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		over_ons_over = newImage("images/over-ons-over.gif");
		diensten_over = newImage("images/diensten-over.gif");
		kwaliteit_over = newImage("images/kwaliteit-over.gif");
		opdrachtgever_over = newImage("images/opdrachtgever-over.gif");
		vacatures_over = newImage("images/vacatures-over.gif");
		contact_over = newImage("images/contact-over.gif");
		preloadFlag = true;
	}
}

function checkinput(){
tekstje='Please fill in all fields of this form!';
ok=true;
if (document.forms[0].elements[1].value=="") ok=false;
if (document.forms[0].elements[3].value=="") ok=false;
if (document.forms[0].elements[4].value=="") ok=false;
if (document.forms[0].elements[5].value=="") ok=false;
if (document.forms[0].elements[6].value=="") ok=false;
if (ok)	{
		emailvak=document.forms[0].elements[2].value;
		if (checkemail(emailvak)==0) {
			ok=false;
			tekstje="The emailaddress is not correct."	
			document.forms[0].elements[2].focus();
			}
}

	if (ok) document.forms[0].submit();
//	if (ok) alert("ok");
	else alert(tekstje)
	ok=true;
}

function checkemail(email)
{
	//check op valid emailadres
	lengte = email.length;
	email_at = false;
	email_punt = false;
	var nPosAt = 0;
	
	for(i=0;i<lengte;i++)
	{
		if (email.charAt(i) == "@")
		{
			if (i != 0)
			{
				nPosAt = i;
				email_at = true;
			}
		}
		if (email.charAt(i) == ".")
		{
			if ((nPosAt < i) && (nPosAt != 0))
				email_punt = true;
		} 
	} 
	if(email_at==false||email_punt==false){
		return 0;
	}else {
		return 1;
		}
}


function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' moet een email adres bevatten.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is verplicht.\n'; }
  } if (errors) alert('De volgende velden zijn onjuist ingevoerd\n'+errors);
  document.MM_returnValue = (errors == '');
}