//	author		: Erik van den Berg
//	rev			: 1.0
//	date		: 08-04-04
var ns4 = (document.layers);
var ie4 = (document.all && !document.getElementById);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);

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;
}
var dsN4=document.layers;
function AE(event,mt){ // v1.0 4LevelWebs
 this[event]=mt;if(dsN4){this.captureEvents(Event[event.substr(2,event.length).toUpperCase()])}}function RE(event){
 this[event]=null;if(dsN4){this.releaseEvents(Event[event.substr(2,event.length).toUpperCase()])}}
 function FN(){if(dsN4){history.go(0)}}var dsCC=null;var dsDL=false;function OS(i){
 var e,q,pp=(!dsN4)?"px":"";if((e=MM_findObj(i))!=null){q=(document.layers)?e:e.style}
 e.gT=function(){return parseInt(q.top+pp)||0};e.sT=function(y){q.top=y+pp};
 e.gH=function(){return dsN4?e.document.height:e.offsetHeight};
 e.gC=function(){return dsN4?e.clip.height:e.offsetHeight};
 e.AE=AE;e.RE=RE;return e;}function GM(e){return document.all?event.clientY:e.pageY;
}
function dsSC(s,d,t,a,b,c,e,m){ // v1.0 4LevelWebs
 var mu='onmouseup',md='onmousedown',mo='onmouseout';
 sT=null;sS=s;dH=d;tH=t;tO=OS(a);uO=OS(b);dO=OS(c);gO=OS(e);
 cM=OS(m);tT=gO.gT();tL=tH-dH;tB=tT+tL;cH=cM.gC();tO.AE(md,SJ);
 uO.AE(md,function(){SC(sS);return false});uO.AE(mu,SS);uO.AE(mo,SS);
 dO.AE(md,function(){SC(-sS);return false});dO.AE(mu,SS);dO.AE(mo,SS);
 gO.AE(md,SD);gO.AE('ondragstart',function(){return false});dsDL=true;LC(dsvNm);
 }function LC(n){if(!dsDL)return;if(dsCC!=null){cOb.sT(0);cOb.hV()}
 cOb=OS(n,'dsvContainer');cHt=cOb.gH();cLt=cHt-cH;sLt=tL/cLt;gO.sT(tT);
}
function SD(e){ // v1.0 4LevelWebs
dSM=GM(e);dSO=gO.gT();document.AE("onmousemove",DG);document.AE("onmouseup",PD);
 return false}function cT(){clearTimeout(sT)}function PD(){document.RE("onmousemove");document.RE("onmouseup")}
 function DG(e){var m=GM(e),d=m-dSM,x =dSO+d,d=(x<tT)?tT:(x>tB)?tB:x;gO.sT(d);var c=-(d-tT)*(1/sLt);cOb.sT(c);
 return false}function SC(s){cT();var c=cOb.gT()+s,d=tT-Math.round(cOb.gT()*(tL/cLt));if(c>0){c=0}else{
 if(c<-cLt){c=-cLt}}if(d<tT){d=tT}else{if(d>tB){d=tB}}cOb.sT(c);gO.sT(d);sT=setTimeout("SC("+s+")",25)}
 function SS(){cT();sT=null}function SJ(e){cT();var m=GM(e),x=m-(dH/2),d=(x<tT)?tT:(x>tB)?tB:x;
 gO.sT(d);var c=-(d-tT)*(1/sLt);cOb.sT(c);return false;
}
document.AE=AE;document.RE=RE,dsvNm="dsvContent1";
function dsvSH(el,u,v,w){ //v1.0 4LevelWebs
 if(el!=dsvNm){var x,y,z,q,h,s,a,d,l;
 if((x=MM_findObj(dsvNm))!=null){q=(document.layers)?x:x.style}q.top=0;q.left=0;
 if((y=MM_findObj('dsvTrack'))!=null){tk=(document.layers)?y:y.style}var tt=tk.top;var tl=tk.left;
 if((z=MM_findObj('dsvDrag'))!=null){dg=(document.layers)?z:z.style}dg.top=tt;dg.left=tl;
 var n4=document.layers,h=(n4)?'hide':'hidden',s=(n4)?".visibility=":".style.visibility=";
 a=new Array("dsvContent");for(i=0;i<30;i++){d=MM_findObj(a+[i+1]);if(d){l=(n4)?d:d.style}
 l.visibility=h}dsvNm=el;dsSC(u,v,w,'dsvTrack','dsvUp','dsvDown','dsvDrag','dsvContainer');
 eval("MM_findObj(el)"+s+'"visible"')}
}
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_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];}
}
onresize=FN;

function getObj(id) {
	if(ns4){
		return document.layers[id];
	}
	// Explorer 4
	else if(ie4){
		return document.all[id];
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		return document.getElementById(id);
	}
}

function setPos() {
	var width;
	var basePos = 195;
	width = document.body.offsetWidth;
	if (width == null || width == 0) {
		width = window.innerWidth;
	}
	bgPos = Math.round(((parseInt(width)-686)/2)+basePos);
	//alert("position: "+bgPos+", width: "+width);
	if(bgPos<basePos) {
		bgPos = basePos;
	}
	ObjBody = getObj("bodybg");
	ObjBody.style.backgroundPosition = ""+bgPos+"px 450px";
}

function getHeight(obj) {
	if (obj == "window") {
		if (window.innerHeight) return window.innerHeight;
		else return getObj("bodyNode").offsetHeight;
	} else {
		obj = getObj(obj);
		if (obj.offsetHeight) return obj.offsetHeight;
	}
}

function Status() {
	top.status = '© planschets.nl';
	return true;
}

function init() {
	//alert('js file included');
	Status();
	setPos();
	lineHeight = 16;
	contentRect = Math.round(getHeight("dsvContainer")/lineHeight);
	contentHeight = Math.round(getHeight("dsvContent1")/lineHeight);
	if(contentHeight>contentRect) {
		//alert("initScroll: start scrollbars\ncontentRect: "+contentRect+", contentHeight: "+contentHeight);
		var scrollerHolder = getObj("scrollerHolder");
		//alert(scrollerHolder);
		scrollerHolder.style.visibility = "visible";
		dsSC(17,33,255,'dsvTrack','dsvUp','dsvDown','dsvDrag','dsvContainer');
	}
	MM_preloadImages('images/nav/nav_vinland_wat_is_over.gif','images/nav/nav_vinland_klimaat_over.gif','images/nav/nav_vinland_bevolking_over.gif','images/nav/nav_vinland_geschiedenis_ov.gif','images/nav/nav_vinland_bezienswaard-10.gif','images/nav/nav_vinland_tradities_over.gif','images/nav/nav_vinland_bezoek_over.gif','images/nav/nav_vinland_home_over.gif');
}