function changeStyle (what , how) {
  	what.className = how;
}

function changeStyle2 (what , how) {
  	document.getElementById(what).className = how;
}

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];}
}

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_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;
}
//window.attachEvent("onload", correctPNG);

function HideAllLayers() {
	MM_showHideLayers('menu_wat_kunnen_wij','','hide'); 
	MM_showHideLayers('menu_contact','','hide'); 
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'block':(v=='hide')?'none':v; }
    obj.display=v; }
}


function test(strDiv)
{
if(document.getElementById(strDiv).style.display == 'block')
{
document.getElementById(strDiv).style.display = 'none'
}
else
{
document.getElementById(strDiv).style.display = 'block'
}
}




var ShowHideElement = new function()
{
    this.ControlElement = function(Element, WichElement)
    {
        this.Element = Element;
        this.WichElement = WichElement;
        
        if(this.Element.title == 'selected')
        {
           this.HideElement()
        }
        else
        {
            this.ShowElement()
        }
        
        
    }
    
    
    this.ShowElement = function()
    {
        this.Element.style.background = 'url(\'images/arrow_orange_down.gif\') top right';
        this.Element.style.backgroundRepeat = 'no-repeat';
        this.Element.title = 'selected'
        document.getElementById(this.WichElement).style.display = 'block'
        
    }
    
    
    
    
    this.HideElement = function()
    {
        this.Element.style.background = 'url(\'images/arrow_orange.gif\') top right';
        this.Element.style.backgroundRepeat = 'no-repeat';
        this.Element.title = ''
        document.getElementById(this.WichElement).style.display = 'none'
    }
    
}