function isEmpty(strNaam){
	//change "field1, field2 and field3" to your field names
	strNaam = document.forms[0].naam.value ;
	
	//name field
    if (strNaam == "" || strNaam == null || !isNaN(strNaam) || strNaam.charAt(0) == ' ')
    {
    alert("\"Naam\" is un verpligt infoerfelt.\nProbeert ut nogmaals ajb.");
	document.forms[0].naam.focus();
    return false;
    }
    return true;
}


//function to check valid email address
function isValidEmail(strEmail){
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
  strEmail = document.forms[0].email.value;

   // search email text for regular exp matches
    if (strEmail.search(validRegExp) == -1) 
   {
      alert('Wij kunne u enkel antwoorde as we un geldig imeeladres van u hebbe.\n Dese is niet geldig! Probeer u ut nogmaals');
	  document.forms[0].email.focus();
	  document.forms[0].email.select();
      return false;
    } 
    return true; 
}

function isGoedTelNummer(telnr){
	strTelnr = document.forms[0].telnr.value;
	if (!IsNumeric(strTelnr)){
		alert('Enkel getalle astublief.\nProbeer u ut nogmaals');

		 document.forms[0].telnr.select();
		return false
	}
	if (strTelnr.length<8){
		alert('Wij souwe ut bisonder op prijs stelle as we u kenne belle.\n Uw telefoonnummer lijkt ons frij kort. Probeer u ut nogmaals');
		document.forms[0].telnr.focus();
		return false;
	}
	return true;
}

function IsNumeric(sText)

{
   var ValidChars = "0123456789-()";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
			
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }

//function that performs all functions, defined in the onsubmit event handler

function check(form){
	if (isEmpty(form.naam)){
		if (isValidEmail(form.email)){
			if (isGoedTelNummer(form.telnr)){
				return true;
			}
	 		return false;		
  		}
		return false;
	}
	return false;
}

function showID(welke, welkeniet){
	//document.getElementById('sondag').style.display = 'none';
	if(!welkeniet){
		var myFx = new Fx.Style(welke, 'opacity').set(0);
		document.getElementById("frijdag").style.display = 'block';
	}
	else{
		var myFx = new Fx.Style(welkeniet, 'opacity').start(0);
		var myFx = new Fx.Style(welke, 'opacity').start(1);
	}
}




function redirect(pagina) { 
	var strURL = document.location.href; //hele url ophalen


if (!(top.frames.length)){
	createCookie('pagina',pagina,0);
	parent.frames.top.location.replace("../default.php");

	 }
else if ((top.frames.length == 0)&&(top.frames[0].name =! 'contentarea')){
	createCookie('pagina',pagina,0);
	parent.frames.top.location.replace("../default.php");
	} 

else if(!(top.frames[0].name == 'contentarea')&&!(top.frames[0].name == '111')){
		createCookie('pagina',pagina,0);
		parent.frames.top.location.replace("../default.php");
}


//else if((top.frames[0].name == 'contentarea')){
//		createCookie('pagina',pagina,0);
//	}

else if(strURL == 'http://www.trane-met-tuite.nl/html/tvoranje.html'){
	createCookie('pagina',pagina,0);
	parent.frames.top.location.replace("../default.php");

	}
}


function getElementsByClassName( clsName ) 
{ 
	var arr = new Array(); 
	var elems = document.getElementsByTagName("*");
	for ( var cls, i = 0; ( elem = elems[i] ); i++ )
	{
		if ( elem.className == clsName )
		{
			arr[arr.length] = elem;
		}
	}
	return arr;
}


/*ROLLOVER IMAGE */
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

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);
		alert(d);
	}
	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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

/*ROLLOVER IMAGE */

function escramble(eerste,tweede,derde){
	var a,b,c,d,e,f,g,h,i
	a='<a href=\"mai'
	b = eerste;
	c='\">'
	a+='lto:'
	b+='@'
	e='</a>'
	f=''
	b+=tweede+'.'+derde
	g='<img src=\"'
	h=''
	i='\" alt="Email us." border="0">'
	
	if (f) d=f
	else if (h) d=g+h+i
	else d=b
	document.write(a+b+c+d+e)
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function checkCookie(){
	var x = readCookie('pagina') //kijkt of dit een re-direct is van een andere bestaande pagina
	eraseCookie('pagina');
	if (x){
		document.getElementById('contentarea').src = x;
		frames['contentarea'].location.href =x;
	}
}

function checkFrame(){
// Onderstaande script is bedoeld tegen loads zonder frame	
// Als er geen frames omheen zitten dan bekijken welke pagina dit is en plaatsen in het default frame.
   if (parent.location.href == self.location.href){
		var strURL = document.location.href; //hele url ophalen
		//var strPagina = '/html/'+strURL.substring(strURL.lastIndexOf('/') - 5); //enkel de pagina titel
		//alert(strURL.substring(strURL.lastIndexOf('/')-4));
		switch(strURL.substring(strURL.lastIndexOf('/')-4))
		{
			case "html":
				var strPagina = '/html/'+strURL.substring(strURL.lastIndexOf('/') +1); //enkel de pagina titel
				break; 
			case "ript":
				var strPagina = './script/'+strURL.substring(strURL.lastIndexOf('/') +1); //enkel de pagina titel
				break; 
			default:
				var strPagina = '/html/'+strURL.substring(strURL.lastIndexOf('/') +1); //enkel de pagina titel
				break; 
		}
		createCookie('pagina', strPagina, 0); //coockie plaatsen
		document.location.href = 'http://www.trane-met-tuite.nl/'; //redirect naar main
	}
}

function imgSwap(oImg)
{
   var strOver  = "Aan.png"    // image to be used with mouse over
   var strOff = ".png"     // normal image
   var strImg = oImg.src
   if (strImg.indexOf(strOver) != -1) 
      oImg.src = strImg.replace(strOver,strOff)
   else
      oImg.src = strImg.replace(strOff,strOver)
}