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_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 SetSelectBox(field,waarde) {
   for (i=0;i<document.theform.elements[field].length;i++) {
      if(document.theform.elements[field].options[i].value==waarde) {
         document.theform.elements[field].options[i].selected = true;
      }
   }
}

function timeDifference(laterdate,earlierdate) {
    var difference = laterdate.getTime() - earlierdate.getTime();

    var daysDifference = Math.floor(difference/1000/60/60/24);
    difference -= daysDifference*1000*60*60*24

      return daysDifference;
}

function ShowVanCalender() {
   HideAll(); 
   MM_showHideLayers('vankalenderContainer','','show');
   MM_showHideLayers('vanheader','','show');
   MM_showHideLayers('vanstripe','','show');

   document.getElementById('vankalender').style.display = "block";

   javascript:cal1.showCalendar('anchor1van');

}

function ShowTotCalender() {
   HideAll();
   MM_showHideLayers('totkalender2Container','','show');
   MM_showHideLayers('totheader','','show');
   MM_showHideLayers('totstripe','','show');

   document.getElementById('totkalender2').style.display = "block";
   javascript:cal2.showCalendar('anchor1tot');
}

function setMultipleValuesVan(y,m,d) {
   SetSelectBox('l-vanjaar',y);
   SetSelectBox('l-vanmaand',m);
   SetSelectBox('l-vandag',d);
   MM_showHideLayers('vankalenderContainer','','hide');
   MM_showHideLayers('vanheader','','hide');
   MM_showHideLayers('vanstripe','','hide');
   MM_showHideLayers('totkalender2Container','','hide');
   MM_showHideLayers('totheader','','hide');
   MM_showHideLayers('totstripe','','hide');
   MM_showHideLayers('vankalender','','hide');
   MM_showHideLayers('totkalender2','','hide');

}

function setMultipleValuesTot(y,m,d) {
   SetSelectBox('l-totjaar',y);
   SetSelectBox('l-totmaand',m);
   SetSelectBox('l-totdag',d);
   MM_showHideLayers('totkalender2Container','','hide');
   MM_showHideLayers('totheader','','hide');
   MM_showHideLayers('totstripe','','hide');
   MM_showHideLayers('vankalenderContainer','','hide');
   MM_showHideLayers('vanheader','','hide');
   MM_showHideLayers('vanstripe','','hide');
   MM_showHideLayers('vankalender','','hide');
   MM_showHideLayers('totkalender2','','hide');
}

function HideAll() {
   MM_showHideLayers('totkalender2Container','','hide');
   MM_showHideLayers('totheader','','hide');
   MM_showHideLayers('totstripe','','hide');
   MM_showHideLayers('totkalender2','','hide');

   MM_showHideLayers('vankalenderContainer','','hide');
   MM_showHideLayers('vanheader','','hide');
   MM_showHideLayers('vanstripe','','hide');

   document.getElementById('vankalender').style.display = "none";
   document.getElementById('totkalender2').style.display = "none";



}