function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
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_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) { //v4.0
  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 && document.getElementById) x=document.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 MM_nbGroup(event, grpName) { //v3.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : args[i+1];
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    if ((nbArr = document[grpName]) != null)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = args[i+1];
      nbArr[nbArr.length] = img;
  } }
}

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
// -->

function MM_showHideLayers() { //v3.0
  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')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function getWindowHeight() {
var windowHeight=0;
if (typeof(window.innerHeight)=='number') {
windowHeight=window.innerHeight;
}
else {
if (document.documentElement&&
document.documentElement.clientHeight) {
windowHeight=
document.documentElement.clientHeight;
}
else {
if (document.body&&document.body.clientHeight) {
windowHeight=document.body.clientHeight;
}
}
}
return windowHeight;
}

function setDIVHeight() {
if (document.getElementById) {
	var windowHeight=getWindowHeight();
	var wrapElement=document.getElementById('oma');
	var homeElement=document.getElementById('home-tekst');
	var vervolgElement=document.getElementById('vervolg-tekst');
	var booksElement=document.getElementById('books-tekst');
	var opsommingElement=document.getElementById('opsomming');
	var backElement=document.getElementById('background');
	if (windowHeight>0 && windowHeight<550) {
	if (wrapElement) wrapElement.style.height=windowHeight + "px";
	if (wrapElement) wrapElement.style.marginTop="0px";
	if (wrapElement) wrapElement.style.top="0px";
	if (homeElement) homeElement.style.height=windowHeight - 185 + "px";
	if (vervolgElement) vervolgElement.style.height=windowHeight - 190 + "px";
	if (booksElement) booksElement.style.height=windowHeight - 190 + "px";
	if (opsommingElement) opsommingElement.style.height=windowHeight - 160 + "px";
	if (backElement) backElement.style.height=windowHeight - 60 + "px";
	}
	else if (windowHeight>0&&wrapElement.style.height != 550) {
	if (wrapElement) wrapElement.style.height="550px";
	if (wrapElement) wrapElement.style.marginTop="-275px";
	if (wrapElement) wrapElement.style.top="50%";
	if (homeElement) homeElement.style.height="365px";
	if (vervolgElement) vervolgElement.style.height="360px";
	if (booksElement) booksElement.style.height="360px";
	if (opsommingElement) opsommingElement.style.height="390px";
	if (backElement) backElement.style.height="490px";
	}
}
}

window.onresize = function(){
	setDIVHeight();
}

function checksubmit()
{
   if (document.inform.voorletters.value == "")
   {
      alert("Please fill in your initials.")
      document.inform.voorletters.focus()
      return false
   }
   if (document.inform.naam.value == "")
   {
      alert("Please fill in your surname.")
      document.inform.naam.focus()
      return false
   }
   if (document.inform.adres.value == "")
   {
      alert("Please fill in your address.")
      document.inform.adres.focus()
      return false
   }
   if (document.inform.postcode.value == "")
   {
      alert("Please fill in your zipcode.")
      document.inform.postcode.focus()
      return false
   }
   if (document.inform.plaats.value == "")
   {
      alert("Please fill in your city.")
      document.inform.plaats.focus()
      return false
   }
   if (document.inform.land.value == "")
   {
      alert("Please fill in your country.")
      document.inform.land.focus()
      return false
   }
   if (document.inform.email.value == "")
   {
      alert("Please fill in your emailaddress")
      document.inform.email.focus()
      return false
   }
   if (!document.inform.actie[0].checked && !document.inform.actie[1].checked && !document.inform.actie[2].checked)
   {
      alert("Please choose the type of request you want to make.")
      return false
   }
   if (document.inform.info.value == "")
   {
      alert("Please specify the information you require.")
      document.inform.info.focus()
      return false
   }
   return true
}


function onload_genre(){
	MM_nbGroup('init','group1','theme','images/menu-theme.gif',1);
	MM_showHideLayers('opsomming','','hide','gallthema','','show','gallimage','','hide')
}

function onload_style(){
	MM_nbGroup('init','group1','style','images/menu-style.gif',1);
	MM_showHideLayers('opsomming','','hide','gallthema','','hide','gallimage','','hide','gallstyle','','show')
}

function onload_painting(categorie){
	if (categorie == 'theme') {
		MM_swapImage('artist','','images/menu-artist.gif',1);
		MM_swapImage('theme','','images/menu-theme-over.gif',1);
		MM_nbGroup('init','group1','theme','images/menu-theme.gif',1);
		MM_showHideLayers('opsomming','','hide','gallthema','','show','gallimage','','hide');
	}
	if (categorie == 'image') {
		MM_swapImage('artist','','images/menu-artist.gif',1);
		MM_swapImage('image','','images/menu-image-over.gif',1);
		MM_nbGroup('init','group1','image','images/menu-image.gif',1);
		MM_showHideLayers('opsomming','','hide','gallthema','','hide','gallimage','','show');
	}
	if (categorie == 'style') {
		MM_swapImage('artist','','images/menu-artist.gif',1);
		MM_swapImage('style','','images/menu-style-over.gif',1);
		MM_nbGroup('init','group1','style','images/menu-style.gif',1);
		MM_showHideLayers('opsomming','','hide','gallthema','','hide','gallimage','','hide','gallstyle','','show');
	}
}

function onload_book(categorie){
	if (categorie == 'author') {
		MM_swapImage('artist','','images/menu-artist-b.gif',1);
		MM_swapImage('author','','images/menu-author-over.gif',1);
		MM_nbGroup('init','group1','author','images/menu-author.gif',1);
		MM_showHideLayers('opsomming','','hide','bookauthor','','show','bookkeyword','','hide','bookcomplete','','hide');
	}
	if (categorie == 'keyword') {
		MM_swapImage('artist','','images/menu-artist-b.gif',1);
		MM_swapImage('keyword','','images/menu-keyword-over.gif',1);
		MM_nbGroup('init','group1','keyword','images/menu-keyword.gif',1);
		MM_showHideLayers('opsomming','','hide','bookauthor','','hide','bookkeyword','','show','bookcomplete','','hide');
	}
	if (categorie == 'complete') {
		MM_swapImage('artist','','images/menu-artist-b.gif',1);
		MM_swapImage('complete','','images/menu-complete-over.gif',1);
		MM_nbGroup('init','group1','complete','images/menu-complete.gif',1);
		MM_showHideLayers('opsomming','','hide','bookauthor','','hide','bookkeyword','','hide','bookcomplete','','show');
	}

}