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; ia.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) { //v4.0
  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&&id.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 OpenSmallWindow(url,width,height,windowname) {
	Features = "toolbar=no,location=no,directories=no,status=no,menubar=yes,scrollbars=yes,width=" + width + ",height=" + height + ",resizable=yes"
	//NewWindow = window.open(page,windowname,Features);
	eval(windowname+'=window.open("'+url+'","'+windowname+'","'+Features+'");');

}


function sluit(){
	this.window.close();
}

function GetShortMonthName(dtDate) {
	strDate = dtDate.toString();
	arrSplitDate = strDate.split(' ');
	strMontName = arrSplitDate[1];
	return strMontName;
}

function LongYear(nr) {
	intLongYear = nr;
	if (nr < 100) {intLongYear = 1900 + nr;}
	dtTest = new Date(2000,0,1);
	if (dtTest.getYear() == 100 ){intLongYear = 1900 + nr;}
	return intLongYear;
}



function disable_right_click(e)
{
    var browser = navigator.appName.substring ( 0, 9 );
    var event_number = 0;
    if (browser=="Microsoft")
        event_number = event.button;
    else if (browser=="Netscape")
        event_number = e.which;
    if ( event_number==2 || event_number==3 )
        {
        alert ("Right Mouse Button Is Disabled");
        return (false);
        }

    return (true);
}

function trap_images_mouse_events ()
{
    if ( document.images )
        {
        for (var pic=0; pic<document.images.length; pic++)
            document.images[pic].onmousedown = disable_right_click;
        }
}

	img1 = new Image();
	img1.src = "gfx/leeg.gif";

function LTrim(str) {
	if (str.length == 0) {return str};
	intSpaceFound = str.indexOf(" ");
	while (intSpaceFound == 0 ) {
		str = str.substring(1,str.length);
		intSpaceFound = str.indexOf(" ");
	}	
	return str;
}

function RTrim(str) {
	if (str.length == 0) {return str};
	intSpaceFound = str.lastIndexOf(" ");
	while (intSpaceFound > 0 && intSpaceFound == str.length - 1) {
		str = str.substring(0,str.length - 1);
		intSpaceFound = str.lastIndexOf(" ");
	}	
	return str;
}

function Trim(str) {
	str = LTrim(str);
	str = RTrim(str);
	return str;
}

function stem(){
	document.poll.vote.value = 1;
}


function anderepolls(){
	document.poll.action = "polls.php";
}


function submitExh(val){
	document.FRMzoek.eerderid.value = val;
	document.FRMzoek.submit();
}


function submitFeedback(mode,toevoegen, startrow){
	document.feedback.action = "feedback_action.php";
	document.feedback.mode.value = mode;
	document.feedback.toevoegen.value = toevoegen;
	document.feedback.startrow.value = startrow;
	document.feedback.submit();
}

function showBericht(){
	document.getElementById("bericht").style.display = "";
}



// index
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')?'visible':(v=='hide')?'hidden':v; }
	   obj.visibility=v; }
}

function show(laag){
	MM_showHideLayers(laag,'','show');
	document.FRMzoek.show.value = 1;
}
function hide(laag){
	MM_showHideLayers(laag,'','hide');
	document.FRMzoek.show.value = 0;
}

function submitZoek(){
	document.FRMzoek.startrow.value = 0;
	document.FRMzoek.submit();
}

function SubmitFormColl(img, index, language, dest){
	document.forms[0].img.value = img;
	document.forms[0].action = dest;
	document.forms[0].submit();
}

function pagergroot(nr){
	document.FRMzoek.nr.value = nr;
	document.FRMzoek.submit();
}

function terug(nr){
	document.FRMzoek.terug.value = nr;
	document.FRMzoek.img.value = 0;
	document.FRMzoek.submit();
}

function resVals(){
	document.forms[0].img.value = 0;
	document.forms[0].index.value = 0;
	document.forms[0].exhibition_id.value = 0;
	document.forms[0].submit();
}

function checkFormNieuwsbrief(meld_naam, meld_email){

	//--- check of een naam / email is aangegeven
	if (document.forms[0].naam.value == ""){
		alert(meld_naam);
		document.forms[0].naam.focus();
		return false;
	}
	
	if (document.forms[0].email.value == ""){
		alert(meld_email);
		document.forms[0].email.focus();
		return false;
	}else{
		// aparte email check
		var temp     = document.forms[0].email.value;
		var AtSym    = temp.indexOf('@');
		var Period   = temp.lastIndexOf('.')
		var Space    = temp.indexOf(' ')
		var Length   = temp.length - 1   // Array is from 0 to length-1

		if ((AtSym < 1) ||                  // '@' cannot be in first position
			(Period <= AtSym+2) ||            // Must be atleast one valid char btwn '@' and '.'
			(Period == Length ) ||            // Must be atleast one valid char after '.'
			(Space  != -1))                   // No empty spaces permitted
			{
				alert(meld_email);
				document.forms[0].email.focus();
				return false;
			}
	}
	
}