// JavaScript Document
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);}
  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];}
}

var currentNews = null;

function visi(nr)
{
	if(currentNews!=null)
	{
		document.getElementById(currentNews).style.display = "none";
	}
	document.getElementById(nr).style.display = "inline";
	currentNews = nr;
}

var requiredPrefix = 'r_';

function setup()
{
	MM_preloadImages('images/fortress-over.gif',
					'images/gebouw-over.gif',
					'images/nieuws-over.gif',
					'images/contact-over.gif',
					'images/energie-over.gif');
					
	var elements;
	var element;
	
	var forms = document.forms;
	for(var f in forms)
	{
		//forms[f].onsubmit = CheckForm;
		elements = forms[f].elements;
		for(var e in elements)
		{
			element = elements[e];
			if(element)
			{
				if(element.name)
				{
					if(String(element.name).indexOf(requiredPrefix) != -1)
					{
						element.onblur = ValidateElement;
					}
				}
			}
		}
	}
}

function ValidateElement(event)
{
	if(this.value == null || this.value == '')
	{
		this.style.borderColor = '#F00';
		this.valid = false;
	}
	else
	{
		this.style.borderColor = '';
		this.valid = true;
	}
}

function CheckForm(formid)
{
	var items = document.getElementById(formid).elements;
	
	var item;
	var valid = true;
	
	for(var i in items)
	{
		item = items[i];
		if(item)
		{
			if(String(item.name).indexOf(requiredPrefix) != -1)
			{
				if(item.onblur)
				{
					item.onblur();
				}
				valid = valid && item.valid;
			}
		}
	}
	
	//document.getElementById("lblSendMail").innerHTML = "";
	if(!valid)
	{
		document.getElementById('messages').innerHTML = '<p class="error">Vul alstublieft de gemarkeerde velden in.</p>';
	}
	else
	{
		document.getElementById('messages').innerHTML = '';
		document.getElementById(formid).submit();
	}
}
var oldImgA;
var oldImgB;
var oldIdA;
var oldIdB;
function rollOver(newIdA , newImgA ,newIdB , newImgB)
{	
	oldImgA = document.getElementById(newIdA).src;
	oldImgB = document.getElementById(newIdB).src;
	oldIdA = newIdA;
	oldIdB = newIdB;
	document.getElementById(newIdA).src = newImgA;
	document.getElementById(newIdB).src = newImgB;
}
function rollOut()
{
	document.getElementById(oldIdA).src = oldImgA;
	document.getElementById(oldIdB).src = oldImgB;	
}