function isLayered() {
	return parseInt(window.navigator.userAgent.charAt(window.navigator.userAgent.indexOf("/")+1),10) >= 4;
}

function isMac() {
	return window.navigator.userAgent.indexOf("Mac") > 0;
}

function isIE() {
	return window.navigator.userAgent.indexOf("MSIE") > 0;
}

function getStyle(doc, o) {
	if(isIE()) {
		return doc.all.tags("div")[o].style;
	} else {
		return getObject(doc, o, 0);
	}
}

function getObject(d, n) {
	var p,i,x;
	if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);
	}
	if(!d) {	// start at first doc in full tree...
		if(parent.frames.length) {
			d = top.frames[0].document;
		} else {
			d = top.document;
		}
	}
	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=getObject(d.layers[i].document, n);
	if(!x && d.getElementById)
		x=d.getElementById(n);

	return x;
}

function setImage(doc, name, url) {
	var _o = null;
	_o = getObject(doc, name);
	if (_o) _o.src = url;
}

function go(doc, act) { return go(doc, act, '','','',''); }
function go(doc, act, par1) { return go(doc, act, par1,'','',''); }
function go(doc, act, par1, par2) { return go(doc, act, par1, par2,'',''); }
function go(doc, act, par1, par2, par3) { return go(doc, act, par1, par2, par3,''); }
function go(doc, act, par1, par2, par3, par4) { return go(doc, act, par1, par2, par3, par4); }

function go(doc, act, par1, par2, par3, par4) {
//alert('go(doc,'+act+','+par1+','+par2+','+par3+','+par4+')');
	var f = doc.forms["silhouet"];
	var e = doc.forms["silhouet"].elements;

	e["act"].value = act;
	if(par1) e["par1"].value = par1;
	if(par2) e["par2"].value = par2;
	if(par3) e["par3"].value = par3;
	if(par4) e["par4"].value = par4;

	doc.forms["silhouet"].submit();

	return 1;
}

function menu(act) {
	if(act != '') {
		parent.frames.f_content.location = "go.php?f_act=content&" + act;
	}
}

function setDisplay(o, v) {
	var s = 0;
	if(o.style) {
		if(v) {
			o.style.display = "inline";
		} else {
			o.style.display = "none";
		}
	} else {
		if(v) {
			o.visibility = "show";
		} else {
			o.visibility = "hidden";
		}
	}
}

function setVisibility(o, v) {
	var s = 0;
	if(o.style) {
		if(v) {
			o.style.visibility = "visible";
		} else {
			o.style.visibility = "hidden";
		}
	} else {
		if(v) {
			o.visibility = "show";
		} else {
			o.visibility = "hidden";
		}
	}
}

function formSetValue(doc, c, v) {
	var o = getObject(doc, c);
	o.value = v;
	return false; // stop cascade
}

function act(doc, act, par1, par2, par3, par4) {
//alert('act(doc,'+act+','+par1+','+par2+','+par3+','+par4+') [_menu=' + top._menu+']');
	if(!top._menu) { top._menu = '-1'; }

	if(act == "mo") {
		setImage(doc, 'm_'+par1, 'img/m_'+par1+'_o.jpg');
	} else if(act == "mc") {
		if(top._menu != '') {
			setImage(doc, 'm_'+top._menu, 'img/m_'+top._menu+'_e.jpg');
		}
		setImage(doc, 'm_'+par1, 'img/m_'+par1+'_o.jpg');
		top._menu = par1;
	} else if(act == "me") {
		if(top._menu == par1) {
			setImage(doc, 'm_'+par1, 'img/m_'+par1+'_o.jpg');
		} else {
			setImage(doc, 'm_'+par1, 'img/m_'+par1+'_e.jpg');
		}
	}
	if(act == "load") {	// laadt pagina full-screen achtig
		// par1=location
		var width;
		var height;
		var w;

		if(isMac()) {
			var width = screen.availWidth - 5;
			var height = screen.availHeight - 10;
			var w = window.open(par1, "_blank", "location=false,address=false,menu=false,toolbar=false,status,resizable=true,width="+width+",height="+height);
		} else {
			var width = screen.availWidth - 8;
			var height = screen.availHeight - 10;
			var w = window.open(par1, "_blank", "location=false,address=false,menu=false,toolbar=false,status,resizable=true,width="+width+",height="+height);
		}
		w.moveTo(0,0);
		w.resizeTo(width, height);
		w.screenX = 0;
		w.screenY = 0;
	}
	if(act == "disclaimer") {
		var width = 400;
		var height = 300;
		var doc = 'disclaimer.html';
		var options = "location=false,address=false,menu=false,toolbar=false,status=false,resizable=true,width="+width+",height="+height;
		var w = window.open(doc, "_blank", options);
		w.moveTo(0,0);
		w.resizeTo(width, height);
		w.screenX = 0;
		w.screenY = 0;
		return false;
	}
	if(act == "bookmark") {
		if (navigator.appName == 'Microsoft Internet Explorer' && parseInt(navigator.appVersion) >= 4) {
			window.external.AddFavorite("http://www.elcea.nl/elacin_nl","Elcea - NL");
		} else {
			alert('Druk op Ctrl-D om deze pagina op te nemen in uw bookmarks.');
		}
	}
	if(act == "hide") {
		// par1=name
		var _o = null;
		_o = getObject(doc, par1);
		if (_o) setVisibility(_o, false);
	}
	if(act == "hide_popup") {
		var _o = null;
		_o = top.frames["f_content"].document.all.popup;
		if (_o) setVisibility(_o, false);
	}
	if(act == "open") {
		// par1=location
		// par2=width
		// par3=height
		window.open(par1, "_blank", "location=false,address=false,menu=false,toolbar=false,status,resizable=true,width="+par2+",height="+par3);
	}
	if(act == "popup") {
		// par1=location
		// par2=width
		// par3=height
		window.open(par1, "_blank", "location=false,address=false,menu=false,toolbar=false,status,resizable=false,width="+par2+",height="+par3);
	}
	if(act == "show") {
		// par1=name
		var _o = null;
		_o = getObject(doc, par1);
		if (_o) setVisibility(_o, true);
	}
	if(act == "show_popup") {
		var _o = null;
		_o = top.frames["f_content"].document.all.popup;
		if (_o) setVisibility(_o, true);
	}

	if(act == "changeimg") {
		setImage(doc, par1, par2);
	}
}

function movie_DoFSCommand(act, args) {
	go(document, act, args);
}

function silhouet_debug() {
	var s = "silhouet_debug";

	s += "\nisIE() = " + isIE();
	s += "\nisLayered() = " + isLayered();

	alert(s);
}

var _scheme = "";
var _menu = "";
var _submenu = "";
var _page = "";

function sync(scheme, menu, submenu, page) {

	if(_scheme != scheme || _menu != menu || _submenu != submenu) {
		parent.frames.f_title.location = "go.php?f_act=title&f_page=" + page;
		parent.frames.f_more.location = "go.php?f_act=more&f_page=" + page;
		parent.frames.f_menu.location = "go.php?f_act=menu&f_page=" + page;
	}

	_scheme = scheme;
	_menu = menu;
	_submenu = submenu;
	_page = page;
}

function test(doc) {
	go(doc , 'page', 0, 0, 0);
}
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
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_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_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_nbGroup(event, grpName) { //v6.0
  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])? args[i+1] : img.MM_up);
      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") {
    nbArr = document[grpName];
    if (nbArr)
      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])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}
<!--
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_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function log_out(message) 
{ 
    if (confirm(message)) 
    { 
        return true; 
    } 
    else 
    { 
           return false; 
    } 
} 


function checkform (form,minimaal)
{
  // ** START **
  if (minimaal > form.aantal.value) {
    alert( "Het minimale aantal voor dit artikel is: "+minimaal);
    form.aantal.value = minimaal;
	form.aantal.focus();
    return false ;
  }
  // ** END **
  return true ;
}



function numbersonly(myfield,form, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) ||
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
}