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 openhome() {
 parent.frames[2].location='home.htm'; 
 parent.frames[1].location='top.htm';
} 

function openprogramme() {
 parent.frames[2].location='programme.shtml'; 
 parent.frames[1].location='top_programme.htm';
} 

function openartists() {
 parent.frames[2].location='artists.htm'; 
 parent.frames[1].location='top_artists.htm';
} 

function openpictures() {
 parent.frames[2].location='pictures.htm'; 
 parent.frames[1].location='top_pictures.htm';
} 

function openpicsjan() {
 parent.frames[2].location='pics_jan/index.htm'; 
 parent.frames[1].location='top_pictures.htm';
} 
 
 
function openpicsmrt() {
 parent.frames[2].location='pics_mrt/index.htm'; 
 parent.frames[1].location='top_pictures.htm';
} 

function openaboutus() {
 parent.frames[2].location='aboutus.htm'; 
 parent.frames[1].location='top_aboutus.htm';
}  

function openlocation() {
 parent.frames[2].location='location.htm'; 
 parent.frames[1].location='top_location.htm';
} 

function opencontact() {
 parent.frames[2].location='contact.htm'; 
 parent.frames[1].location='top_contact.htm';
} 

function openguestbook() {
 parent.frames[2].location='guestbook/guestbook.html'; 
 parent.frames[1].location='top_guestbook.htm';
} 

function opentalent() {
 parent.frames[2].location='talent.htm'; 
 parent.frames[1].location='top.htm';
} 

function opentalentfromartists() {
 parent.frames[2].location='../talent.htm'; 
 parent.frames[1].location='../top.htm';
} 

function opentalentfromguestbook() {
 parent.frames[2].location='../talent.htm'; 
 parent.frames[1].location='../top.htm';
}

function openmailinglist() {
 parent.frames[2].location='../../mailing/inschrijven.php'; 
 parent.frames[1].location='/pages/top.htm';
}

function openmailinglistfromguestbook() {
 parent.frames[2].location='../../mailing/inschrijven.php'; 
 parent.frames[1].location='../top.htm';
}

function openmailinglistfrompicssubpage() {
 parent.frames[2].location='../../../mailing/inschrijven.php'; 
 parent.frames[1].location='../../top.htm';
}

function openaboutusfrompicsindex() {
 parent.frames[2].location='../aboutus.htm'; 
 parent.frames[1].location='../top_aboutus.htm';
} 
function openaboutusfrompicssubpage() {
 parent.frames[2].location='../../aboutus.htm'; 
 parent.frames[1].location='../../top_aboutus.htm';
} 

function openoxygenfromartists2() {
 parent.frames[2].location='../artists/oxygen.shtml'; 
 parent.frames[1].location='../top_programme.htm';
} 

function validatesubscribe()
{	
	var email = document.nieuwsbriefForm.email.value;	
	email = email.replace(/^\s*|\s*$/g,""); // trim de string
	document.nieuwsbriefForm.email.value = email; //deze regel is erg belangrijk!

	if(email == '') {
	    alert('Het emailadres is niet ingevuld.');
		return false;
	}

	if(!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(email))) {
        alert('Het emailadres is niet correct ingevuld');
		return false;
	}

    return true;
}