scrHeight = 0;
scrWidth = 0;
function first(){
	requestScreenSize();
//	alert(scrHeight);
	document.getElementById('pixel').style.height = scrHeight - 163 + "px";
}
function erasecontact(){
	document.getElementById('status').innerHTML = "";
	document.getElementById('naam').value = "";
	document.getElementById('email').value = "";
	document.getElementById('bericht').value = "";
	document.getElementById('onderwerp').value = "";
	document.getElementById('bedrijfsnaam').value = "";
	document.getElementById('naamerror').innerHTML = "";
	document.getElementById('emailerror').innerHTML = "";
	document.getElementById('berichterror').innerHTML = "";
	document.getElementById('bedrijfsnaamerror').innerHTML = "";
	document.getElementById('onderwerperror').innerHTML = "";
	
	document.getElementById('naam').style.background = "#fff";
	document.getElementById('email').style.background = "#fff";
	document.getElementById('bericht').style.background = "#fff";
	document.getElementById('onderwerp').style.background = "#fff";
	document.getElementById('bedrijfsnaam').style.background = "#fff";	

	
	
}
function changecontent(button){
	setwidth();
	alert("changecontent"+button);
	if(button == 'home'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/home.jpg)';
		document.getElementById('pagina').innerHTML = 'Home';
	}
	if(button == 'visie'){
		
		document.getElementById('foto').style.backgroundImage = 'url(/img/visie.jpg)';
		document.getElementById('pagina').innerHTML = 'Visie';		
		
	}
	if(button == 'missionstatement'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/missionstatement.jpg)';
		document.getElementById('pagina').innerHTML = 'Mission statement';		
		
	}
	if(button == 'kernkwaliteit'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/kernkwaliteit.jpg)';
		document.getElementById('pagina').innerHTML = 'Kernkwaliteit';		
		
	}
	if(button == 'kernactiviteit'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/kernactiviteit.jpg)';
		document.getElementById('pagina').innerHTML = 'Kernactiviteit';		
		
	}
	if(button == 'ervaring'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/ervaring.jpg)';
		document.getElementById('pagina').innerHTML = 'Ervaring';		
		
	}
	if(button == 'expertise'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/expertise.jpg)';
		document.getElementById('pagina').innerHTML = 'Expertise';		
		
	}
	if(button == 'projecten'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/projecten.jpg)';
		document.getElementById('pagina').innerHTML = 'Projecten';		
		
	}	
	if(button == 'contact'){
		document.getElementById('foto').style.backgroundImage = 'url(/img/contact.jpg)';
		document.getElementById('pagina').innerHTML = 'Contact';		
		
	}	
	
}
function setwidth(){
	first();
	maten =	document.getElementById('body').offsetWidth;
	rightbalk = maten - (document.getElementById('main').offsetWidth);
	if(rightbalk < 0){
		document.getElementById('balk_right').style.display = 'none';
	}
	else{
		if(document.getElementById('balk_right').style.display != 'inline'){
			document.getElementById('balk_right').style.display = 'inline';
		}
	}
	document.getElementById('balk_right').style.width = rightbalk + "px";
	
	
}


function set_time(iSeconds, iMinutes, iHours) {
    document.getElementById('time_seconds').value = 2;
    document.getElementById('time_minutes').value = iMinutes;
    document.getElementById('time_hours').value = iHours;
    
    setTimeout("set_time()", 1000);
    return true;
}
function startTime()
{
var today=new Date()
var h=today.getHours()
var m=today.getMinutes()
var s=today.getSeconds()
// add a zero in front of numbers<10
m=checkTime(m)
s=checkTime(s)
document.getElementById('balk_center_top').innerHTML="<div style=\"margin-right:15px;\"><span>Huidige tijd:</span> "+h+":"+m+":"+s+"</div>"
t=setTimeout('startTime()',500)
}

function checkTime(i)
{
if (i<10) 
  {i="0" + i}
  return i
}
function checkVelden(keer)
{

	var fout
	var statusBar = document.getElementById('status')
	var naam = document.getElementById('naam')
	var email = document.getElementById('email')
	var bericht = document.getElementById('bericht')
	var onderwerp = document.getElementById('onderwerp')
	var bedrijfsnaam = document.getElementById('bedrijfsnaam')	
	var naamError = document.getElementById('naamerror')
	var emailError = document.getElementById('emailerror')
	var berichtError = document.getElementById('berichterror')
	var bedrijfsnaamError = document.getElementById('bedrijfsnaamerror')		
	var onderwerpError = document.getElementById('onderwerperror')	
	var naamVar = naam.value
	var onderwerpVar = onderwerp.value	
	var emailVar = email.value	
	var berichtVar = bericht.value	
	var bedrijfsnaamVar = bedrijfsnaam.value		
	var alfabet = /^[a-zA-Z \_]+$/
	var emailChar = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/
	var berichtChar = /^[\']$/
	
	if(keer == 0)
	{
		naam.style.background = "#fff"
		email.style.background = "#fff"
		bericht.style.background = "#fff"
		onderwerp.style.background = "#fff"	
		bedrijfsnaam.style.background = "#fff"			
		naamError.innerHTML = ''
		emailError.innerHTML = ''
		berichtError.innerHTML = ''
		onderwerpError.innerHTML = ''		
		bedrijfsnaamError.innerHTML = ''				
		statusBar.innerHTML = ''
		fout = 0
	}

	if(naam.value.match(alfabet))
	{
		
	}
	else
	{
		naam.style.background = "#d2222a"
		naamError.innerHTML = '&nbsp;>&nbsp;alleen letters'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	
	if(naam.value.length > 0)
	{
	
	}
	else
	{
		naam.style.background = "#d2222a"
		naamError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	if(onderwerp.value.length > 0)
	{

	}
	else
	{
		onderwerp.style.background = "#d2222a"
		onderwerpError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
if(bedrijfsnaam.value.length > 0)
	{

	}
	else
	{
		bedrijfsnaam.style.background = "#d2222a"
		bedrijfsnaamError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}	
	
	if(email.value.length > 0)
	{

	}
	else
	{
		email.style.background = "#d2222a"
		emailError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	if(email.value.match(emailChar))
	{
		
	}
	else
	{
		email.style.background = "#d2222a"
		emailError.innerHTML = '&nbsp;>&nbsp;ongeldig'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	
	if(bericht.value.length > 0)
	{

	}
	else
	{
		bericht.style.background = "#d2222a"
		berichtError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	if(bericht.value.match(berichtChar))
	{
		berichtVar.replace(/\'/,"-")
	}
	if(bericht.value.length > 0)
	{
	
	}
	else
	{
		bericht.style.background = "#d2222a"
		berichtError.innerHTML = '&nbsp;>&nbsp;verplicht'
		statusBar.innerHTML = 'Formulier bevat fouten'
		++fout
	}
	
	if(fout == 0){
		
		var poststr = "?naam1=" + encodeURI( naamVar ) +
						"&email=" + encodeURI( emailVar ) +
					  "&naam=" + encodeURI( naamVar ) +
					  
					  "&onderwerp=" + encodeURI( onderwerpVar ) +					  
					  "&bedrijfsnaam=" + encodeURI( bedrijfsnaamVar ) +					  					  
					  "&bericht=" + encodeURI( berichtVar )
		zendPOSTRequest('/files/contact_verzend.php', poststr);
		statusBar.innerHTML = '<table cellpadding="0" cellspacing="0"><tr><td>&nbsp;Bezig met verzenden</td></tr></table>'
		
	}	
}
	
function zendPOSTRequest(url, parameters)
{
	http_request = false;
	
	// Als het FireFox is dan:
	if (window.XMLHttpRequest) 
	{
	 	http_request = new XMLHttpRequest();
	}
	// Als het IE is dan:
	else if (window.ActiveXObject) 
	{
	 	try
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
	 	}
		catch (e)
		{
			try 
			{
		   	http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) 
			{}
	 	}
	}
	
	// Wat moet hij doen als de browser geen http_request ondersteund
	if (!http_request) 
	{
	 alert('Kan geen XMLHTTP instantie maken');
	 return false;
	}
	
	http_request.onreadystatechange = verwerkResultaat;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function verwerkResultaat() 
{
	if (http_request.readyState == 4) 
	{
 		if (http_request.status == 200) 
		{
			if(http_request.responseText == 'ok')
			{
				var statusBar = document.getElementById('status')
				statusBar.innerHTML = 'Formulier is verzonden'
			}
			else
			{
				var statusBar = document.getElementById('status')
				statusBar.innerHTML = 'Er ging wat fout. Mail frits.opdehaar@fritsopdehaar.nl'
			}
 		} 
		else 
		{
			var statusBar = document.getElementById('status')
			statusBar.innerHTML = 'Er ging wat fout. Mail frits.opdehaar@fritsopdehaar.nl'
 		}
	}
}
function requestScreenSize(){
		scrHeight = 0;
		scrWidth = 0;

		if (window.innerHeight)
	    {
	      scrHeight = window.innerHeight;
	      scrWidth = window.innerWidth;
	    }
	    else if(document.documentElement.clientHeight)
	    {
	      scrHeight = document.documentElement.clientHeight;
	      scrWidth = document.documentElement.clientWidth;
	    }
	    else
	    {
	      scrHeight = document.body.clientHeight;
	      scrWidth = document.body.clientWidth;
	    }
		Values = Array(scrHeight, scrWidth);
		return Values;
	}