function lpad(string,length) {
  while (string.length < length) {
    string = ' ' + string;
    }
  return string;
}

function doFormSubmit(knmCount,sector,schId,arrId,curPag,page,noSubmit,noNew) {
  var form = document.getElementById('form_zoek');
  if (noNew == 1) {
    form.reset();
  }  
  form.action = page;
  form.xl.value = knmCount;
  form.sector.value = sector;
  form.sch_id.value = schId;
  form.arr_id.value = arrId;
  form.p3[0].value = curPag;
  if (!noSubmit || noSubmit == 0) {
    form.submit();
  }
}

function knmChange(knmIndex) {
  var form = document.getElementById('form_zoek');
  if (form.p3[knmIndex].value == lpad('-',100)) {
    return false;
  } else {
    form.p3[knmIndex].value = '';
  }
} 

function knmDel(knmIndex) {
  var form = document.getElementById('form_zoek');
  form.p1[knmIndex].value = '';
  if (form.p3[knmIndex].lang == '1') {
    var elOptNw = document.createElement('option');
    elOptNw.text = ' ';
    elOptNw.value = lpad('-',100);
    try {
      form.p3[knmIndex].add(elOptNw,null); // not IE
    }
    catch(ex) {
      form.p3[knmIndex].add(elOptNw); // IE only
    }
  }
  form.p3[knmIndex].value = lpad('-',100);
}