function Empty1(field)
{
	if(field.value == 'Vul hier een trefwoord in')
	{
	field.value = '';
	}
}
function Fill1(field)
{
	if(field.value == '')
	{
	field.value = 'Vul hier een trefwoord in';
	}
}

function Empty2(field)
{
	if(field.value == 'gebruikersnaam')
	{
	field.value = '';
	}
}
function Fill2(field)
{
	if(field.value == '')
	{
	field.value = 'gebruikersnaam';
	}
}

function Empty3(field)
{
	if(field.value == 'wachtwoord')
	{
	field.value = '';
	}
}
function Fill3(field)
{
	if(field.value == '')
	{
	field.value = 'wachtwoord';
	}
}

function Empty4(field)
{
	if(field.value == 'gebruiker@domein.nl')
	{
	field.value = '';
	}
}
function Fill4(field)
{
	if(field.value == '')
	{
	field.value = 'gebruiker@domein.nl';
	}
}

function Empty5(field)
{
	if(field.value == 'voornaam')
	{
	field.value = '';
	}
}
function Fill5(field)
{
	if(field.value == '')
	{
	field.value = 'voornaam';
	}
}

function Empty6(field)
{
	if(field.value == 'achternaam')
	{
	field.value = '';
	}
}
function Fill6(field)
{
	if(field.value == '')
	{
	field.value = 'achternaam';
	}
}

function Empty7(field)
{
	if(field.value == 'trefwoord')
	{
	field.value = '';
	}
}
function Fill7(field)
{
	if(field.value == '')
	{
	field.value = 'trefwoord';
	}
}

<!--
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];}
}
//-->

function showhide(id){
if (document.getElementById){
obj = document.getElementById(id);
if (obj.style.display == "none"){
obj.style.display = "";
} else {
obj.style.display = "none";
}
}
}
function show(id){
if (document.getElementById){
obj = document.getElementById(id);
obj.style.display = "";
}
}
function hide(id){
if (document.getElementById){
obj = document.getElementById(id);
obj.style.display = "none";
}
}