// basisfuncties

// ijkpunt-1

function findPosY(obj){
ot = 0
if (obj.offsetParent){
while (obj.offsetParent){
ot += obj.offsetTop;
obj = obj.offsetParent;
}
}
else if (obj.y)
ot += obj.y;
}

function findPosX(obj){
objleft = 0
if (obj.offsetParent){
while (obj.offsetParent){
objleft += obj.offsetLeft;
obj = obj.offsetParent;
}
}
else if (obj.x)
objleft += obj.x;
}

// zichtbaarheid browsermelding 
function browserMelding(){
bm = document.getElementById('browsergrootte'); 
bm.style.visibility = "hidden";
if ((document.body.clientWidth < 975) || (document.body.clientHeight <585)){bm.style.visibility = "visible"}}

// pijl-omhoog

function kiesFunctie(){
var keuze="geenIE"
if (document.compatMode && document.all){keuze="IE";doPageTop()}
if (keuze == "geenIE")doPageTop2()
}

   function doPageTop() {
    el = document.getElementById('pageTop')   
 if (document.body.scrollTop>5){

      rightEdge = ((document.body.clientWidth - 976)/2) - el.offsetWidth + 263
      topEdge = document.body.clientHeight - el.offsetHeight + document.body.scrollTop-50
      el.style.pixelTop = topEdge
      el.style.pixelLeft = rightEdge

if (document.body.clientWidth < 976){el.style.pixelLeft = 263} 
 
 el.style.visibility = "visible"
    } else // verberg wanneer paginatop in beeld is
      el.style.visibility = "hidden"
  }

// FireFox
   function doPageTop2() {
    el = document.getElementById('pageTop')  
 if (document.body.scrollTop>5){
    
 topEdge = window.innerHeight - el.offsetHeight + document.body.scrollTop-50

if (window.innerWidth <= 976){ rightEdge=262 }
else 
{ rightEdge=((window.innerWidth - 976)/2)+ 244}
      el.style.top = topEdge
      el.style.left = rightEdge

if (document.body.clientWidth < 976){el.style.pixelLeft = 262}

      el.style.visibility = "visible"
    } else // verberg wanneer paginatop in beeld is
      el.style.visibility = "hidden"
  }
  
  window.onscroll = kiesFunctie 
 
// herlader
 
function herlader(){
window.location.reload(false);
}

// browser grootte

//onResize="setTimeout('kiesFunctie();',10);"//zet dit eventueel in de body

function browserGrootte() {
sah = screen.availHeight
el = document.getElementById('pageTop')  
bm = document.getElementById('browsergrootte')

el.style.pixelTop = 10
el.style.pixelLeft = 10
if ( screen.availHeight > 713){sah=715}
if ( screen.availHeight >738){sah=740}

if (window.screen) {
    ib = document.body.clientWidth;
    ih =document.body.clientHeight;
 if (ib<1023 || ih<595){  

 window.moveTo(0, 0);
    window.resizeTo(1024,sah); bm.style.visibility = "hidden"
  }
}
}

function herstelBrowserGrootte() {
ib = document.body.clientWidth;
ih =document.body.clientHeight;
sah = screen.availHeight
bm = document.getElementById('browsergrootte')

el = document.getElementById('pageTop')  
el.style.pixelTop = 10
el.style.pixelLeft = 10
if ( screen.availHeight > 713){sah=715}
if ( screen.availHeight >738){sah=740}
if (ib<1023 || ih<595){  

window.moveTo(0,0); 
window.resizeTo(1024,sah);scrollTo(0,0); bm.style.visibility = "hidden"
  }
}