function checkForm(obj) {
  var form = obj;
  var name = form.name;
  var valid = true;
  var msg = formInCompleteMsg+" \n\r";
  
  if (requiredFields[name]) {
    for (var i=0; i<requiredFields[name].length; i++) {
      el = form.elements[requiredFields[name][i]]; 
  
      if (el.type == "text" || 
          el.type == "hidden" ||
          el.type == "textarea") {
        if (el.value == "" || (requiredLabels[name][i].indexOf("mail",0)!=-1 && (el.value.indexOf("@",0)==-1 || el.value.indexOf(".",0)==-1))) {
          msg += "/ '"+requiredLabels[name][i]+"' \n\r";
          valid = false;
          swapVerplicht(el.name,"rood");
        }
        else swapVerplicht(el.name,"zwart");
      }
      else if (form.elements[requiredFields[name][i]].length) { // radio
      
        rvalid = false;
        for (var j=0; j<form.elements[requiredFields[name][i]].length; j++) {
          if (form.elements[requiredFields[name][i]][j].checked) {
            rvalid = true;
          }
        }
        
        if (!rvalid) {
          msg += "/ '"+requiredLabels[name][i]+"' \n\r";
          valid = false;
          swapVerplicht(requiredFields[name][i],"rood");
        }
        else swapVerplicht(requiredFields[name][i],"zwart");
      }
    }
  }
  
  if (valid) {
    return true;
  }
  else {
    if (is.ie) {
      getElt("Msg_"+name).innerHTML = "<marquee>"+msg+"</marquee>";
    }
    else alert(msg);
    return false;
  }
}

function swapVerplicht(name,color) {
  var buttonsExtraPath = buttonsImgPath.substring(0,buttonsImgPath.indexOf("buttons/"))+"extra/";
  var s = name;
  while (s.indexOf(".",0) != -1) {
    s = s.substring(0,s.indexOf(".",0))+"_"+s.substring(s.indexOf(".",0)+1,s.length);
  }
  swapImage(buttonsExtraPath+color+"blokje.gif","verplicht_"+s, getElt("allecontent"));
}

function submitForm() {

  var submitArray = submitForm.arguments;
  var name = submitArray[submitArray.length-2];
  var layername = submitArray[submitArray.length-1];
  var form = getForm(name,getElt(layername)); 
  var valid = true;

  for (var i=0; i<submitArray.length-3; i+=2) {
    if (form.elements[submitArray[i]]) form.elements[submitArray[i]].value = submitArray[i+1];
  }
  if (checkForm(form)){
    form.submit();
  }  
}

function openPopup(url,name,attr) {
  popup = window.open(url,name,attr);
  return false;
}

function submitToPopup(name,layer1,layer2) { // zoek, atlas, opiniepeiling
  var form = layer2?getForm(name,getElt(layer1,layer2)):getForm(name,getElt(layer1));
  if (checkForm(form)) {
    var url = form.action;
    for (var i=0; i<form.elements.length; i++) {
      var obj = form.elements[i];
      if (obj.type=="select-one" && obj.options.selectedIndex != -1) url+="&"+obj.name+"="+obj.options[obj.options.selectedIndex].value;
      else if (obj.value != "") url+="&"+obj.name+"="+obj.value;
    }
    popup = window.open(url,"popup","height=450,width=775,"+popupAttributes);
  }
  return false;
}

function transferName(fname,elname,fpath) {
  var file_name = document.forms[fname].elements["uFile."+elname].value;
  file_name = file_name.substring(file_name.lastIndexOf("\\")+1,file_name.length);
  file_name = file_name.substring(file_name.lastIndexOf("/")+1,file_name.length);
  file_name = regExReplaceIcase(file_name,"[^a-z0-9_.-]","");
  document.forms[fname].elements["File."+elname+".Name"].value = file_name;
  document.forms[fname].elements["Mail."+elname+".$value"].value = fpath+file_name;
}

function fixDate(name,source,target) {
  var y = document.forms[name].elements[source+"_y"];
  var m = document.forms[name].elements[source+"_m"];
  var d = document.forms[name].elements[source+"_d"];
  
  var yVal = y.options[y.selectedIndex].value+"";
  var mVal = m.options[m.selectedIndex].value+"";
  var dVal = d.options[d.selectedIndex].value+"";
  
  var dateVal = yVal+mVal+dVal;
  
  document.forms[name].elements[target].value = (dateVal.length == 8)?dateVal:"";
}

function toggleMenu(name,n,alt) {
  if (document.all) {
    if (document.all[name]) {
      document.all[name][1-n].style.display = "none";
      document.all[name][n].style.display = "block";
    }
    else document.reload(alt);
  }
}

function toggleBlock(name,n) {
  if (document.all) {
    for (var i=0; i<document.all[name].length; i++) document.all[name][i].style.display = (n==i)?"block":"none";
  }
}