function goItem(itemno) {

  document.searchform.itemno.value = itemno

  document.searchform.action = "voorwerp.php";
  document.searchform.submit();

}

function Menu( menuid, itemList){
  this.menuid = menuid;
  this.itemList= itemList;
}

function Item( itemid, itemName) {
  this.itemid = itemid;
  this.itemName = itemName;
}

function updateSubcatlist() {
  
  var catList = document.searchform.catlist.options;
  var subcatList = document.searchform.subcatlist.options;

  subcatList.length = 0;

  if (catList[catList.selectedIndex].value == -1) {
    subcatList[0] = new Option( "Kies een categorie", -1 );
  }
  else {
    for ( i = 0; i < submenuList.length; i++ ) {
      if ( submenuList[i].menuid == catList[catList.selectedIndex].value) {
        break;
      }
    }
    if (i < submenuList.length) {
      selSubmenu = submenuList[i].itemList;
      for ( j = 0; j < selSubmenu.length; j++ ) {
        subcatList[j] = new Option(selSubmenu[j].itemName, selSubmenu[j].itemid);
      }
    }
  }
  if (subcatList.length == 1) {
    subcatList.disabled = true;
  }
  else {
    subcatList.disabled = false;
  }

}

function setRadio(src) {

  if (src.name == "period") {
    document.searchform.perioddate[0].checked = true;
    document.searchform.perioddate[1].checked = false;
  }
  else {
    document.searchform.perioddate[0].checked = false;
    document.searchform.perioddate[1].checked = true;
  }

}

function goInsert() {
   
  document.searchform.action = "invoeren.php";
  document.searchform.submit();

}

function validateForm() {
	
    var returnValue = true;
    var errmsg = "";
	
	document.searchform.action = "voorwerp_zoeken.php";

 /*   if (!listSelected(document.searchform.catlist.value)) {
	  errmsg = "Selecteer eerst een categorie.";
      returnValue = false;
	}
	else
	if (!listSelected(document.searchform.location2.value)) {
      errmsg = "Selecteer eerst een provincie.";
      returnValue = false;
    }
*/
    if (!returnValue) {
	  alert(errmsg);
    }

    return returnValue;

}

function listSelected(val) {

	return val != "-1";

}

function validValue(cstring){
  var wronginput = /^ *$/;
  if(wronginput.test(cstring)==true){
    return false;
  }else{
	 return true;
  }
}

function preLoadMain(path) {
  var iList = new Array("header_zoeken.gif","header_invoeren.gif"); 
  var img = new Array();
  for (var i = 0; i < iList.length; i++) {
    img[i] = new Image();
    img[i].src = path + iList[i];
  }
}