// Perform a roundtrip, without updating any database
function roundtrip() {
  if(document.theForm) {
    if(document.theForm._action)
      document.theForm._action.value = 'roundtrip';
    cms_formunchange();   // Prevent a warning in Safari
    document.theForm.submit();
  }
}

function mark_submitted() {
  if(document.theForm && document.theForm._submitted)
    document.theForm._submitted.value = 1;
  top.cms_submitted=1;
  cms_formunchange();   // Prevent a warning in Safari
}

// Submit values with updates!
function submit() {
  mark_submitted();
  document.theForm.submit();
}

function check_form(form) {
  var returnval = check_form_fields(form);

  if(returnval) {
    // Ready for sending. Let's check if there are any upload forms, filled in.
    var inputs = document.getElementsByTagName('input');
    for(var i=0; i<inputs.length; i++) {
      if(inputs[i].type == 'file') {
        if(inputs[i].value) {   // User is about to upload a file
          var id=inputs[i].name+'_wheel';
          var wheel = document.getElementById(id);
          if(wheel)
            wheel.style.visibility = 'visible';
        }
      }
    }
  }
  return returnval;
}

// ************ Form Change mechanism *************//
// Mark form changed
function cms_formchange_init(){
  top.cms_submitted=0;
  top.cms_formchanged=0;
  top.cms_chkformchange_before_called=0;
}

function cms_formchange() {
  top.cms_formchanged=1;
}

// UnMark form changed
function cms_formunchange() {
  top.cms_formchanged=0;
}

// check formchanges
function cms_check_formchange() {
  top.cms_chkformchange_before_called=1;
  if (top.cms_formchanged)
    return(confirm("Wilt u verder gaan zonder de gemaakte wijziging(en) te bewaren?"));
  else
    return(true);
}

function cms_chkformchange_before(sel) {
  if(top.cms_chkformchange_before_called)
    return;
  top.cms_chkformchange_before_called=1;
  if(top.cms_submitted>0)
    return;
  if(document.theForm && document.theForm._action && (document.theForm._action.value == 'roundtrip'))
    return;
  if (top.cms_formchanged) {
    var message = "U hebt wijzigingen gemaakt, die nog niet zijn opgeslagen";
    if(typeof(window.event) != 'undefined')
      window.event.returnValue = message;
    else
      return(message);
  }
  return('');
}

// check formchanges
function cms_chkformchange_unload(sel) {
  if(top.cms_chkformchange_before_called)
    return 1;
  if(top.cms_submitted>0)
    return 1;
  if(document.theForm && document.theForm._action && (document.theForm._action.value == 'roundtrip'))
    return 1;
  if (top.cms_formchanged) {
    alert("U hebt het formulier verlaten, zonder de wijzigingen te bewaren.\n"+
          "Met de back toets van uw browser kunt U weer terug komen "+
          "en de wijzigingen opnieuw maken.");
    return 0;
  }
}

// ************ General form functions *************//

function DeleteItem(itemtype, id) {
  RetVal = confirm("'"+itemtype+"' Verwijderen, Weet u het zeker?");
  if (RetVal == false) return;
  document.theForm._action.value = 'delete'+':'+id;
  document.theForm.submit();
}

function GenPassword(theField) {
  // Generate new password...
  Use = "0123456789abcdefghijklmnopqrstuvwxyz@#$%*";
  UseLen = Use.length;
  PassLen = 8;  // Minimal required length...
  Pass = "";
  for (karak=0; karak<PassLen;karak++) {
    Pass = Pass + Use.charAt(rand(UseLen));
  }
  theField.value = Pass;
}
// Remember only once....
rnd.today=new Date();
rnd.seed=rnd.today.getTime();
function rnd() {
  rnd.seed = (rnd.seed*9301+49297) % 233280;
  return rnd.seed/(233280.0);
}
function rand(number) {
  return Math.ceil(rnd()*number);
}

function SelectDate(date,form,sb_year,sb_month,sb_day) {
  // Select the date of given year/month/date select boxes
  if(typeof(form) != 'object')
    return;
  if(date=='reset') {// Deselect all
    if(sb_year)
      form.elements[sb_year].selectedIndex=0;
    if(sb_month)
      form.elements[sb_month].selectedIndex=0;
    if(sb_day)
      form.elements[sb_day].selectedIndex=0;
  }
  if(date && date != 'today')
    var now = new Date(date);   // Given date
  else
    var now = new Date();       // Today
  var year = now.getYear();
  if(year < 1900) year += 1900;
  var month = 1+now.getMonth();
  var day = now.getDate();
  // Note: The code below uses value-0 to force an integer. This is faster than Number() or parseInt()
  if(sb_year != '') {
    var box = form.elements[sb_year];
    for(var i=0; i<box.options.length; i++) {
      if(box.options[i].value-0 == year) {
        box.selectedIndex = i;
        break;
      }
    }
    if(sb_month!= '') {
      var box = form.elements[sb_month];
      for(var i=0; i<box.options.length; i++) {
        if(box.options[i].value-0 == month) {
          box.selectedIndex = i;
          break;
        }
      }
      if(sb_day!= '') {
        var box = form.elements[sb_day];
        for(var i=0; i<box.options.length; i++) {
          if(box.options[i].value-0 == day) {
            box.selectedIndex = i;
            break;
          }
        }
      }
    }
  }
}