function upd_cart(the_id,amt) {
  amt = amt - 0;
  elm = document.getElementById('a'+the_id);
  var cur = elm.value - 0;
  if(cur+amt >= 0) {
    elm.value = cur+amt;
  }
}
  
function pop(mypage){
  w=350;
  h=250;
  var winl = Math.floor((screen.width-w)/2);
  var wint = Math.floor((screen.height-h)/2);
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars=yes,';
      settings +='resizable=no';
  win=window.open('/'+mypage,'pvg_popup',settings);
  win.window.focus();
}
function imgpop(boomid,w,h){
  generic_imgpop(boomid,w,h,'boom');
}
function generic_imgpop(idnr,w,h,label){
  var winl = Math.floor((screen.width-w)/2);
  var wint = Math.floor((screen.height-h)/2);
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars=no,';
      settings +='resizable=no';
  win=window.open('http://www.petervanginkel.nl/pop_photo.php?id='+idnr+'&type='+label,'pvg_img_'+idnr,settings);
  win.window.focus();
}
function latpop(latid,pos,w,h){  
  w += 20;
  h += 80;
  var winl = Math.floor((screen.width-w)/2);
  var wint = Math.floor((screen.height-h)/2);
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars=no,';
      settings +='resizable=no';
  win=window.open('http://www.petervanginkel.nl/pop_photo.php?lat='+latid+'&pos='+pos,'pvg_img_'+latid+'_'+pos,settings);
  win.window.focus();
}

function incart(artikelid) {
  document.cart.artikel.value = artikelid;
  document.cart.submit();
}

function psw_do(pricetype) {
  document.getElementById('psw').prijzen.value = pricetype;
  document.getElementById('psw').submit();
}

function setimage(imageid, seturl) {
  var e = document.getElementById(imageid);
  e.src = seturl;
}

function menuin(imageid, seturl) {
  setimage('menuicon_'+imageid, seturl);
  //e = document.getElementById('menurow_'+imageid);
  //e.style.backgroundColor = '#000';
  //e.style.color = '#FFF';
}

function menuout(imageid, seturl) {
  setimage('menuicon_'+imageid, seturl);
  //e = document.getElementById('menurow_'+imageid);
  //e.style.backgroundColor = 'transparent';
  //e.style.color = '#000';
}

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];}
}