function show_box (idname){
            document.getElementById(idname).style.display = "";
}

function hide_box (idname){
            document.getElementById(idname).style.display = "none";
}

function change_box (idname){
         if (document.getElementById(idname).style.display == 'none') {
            document.getElementById(idname).style.display = "";
         } else {
            document.getElementById(idname).style.display = "none";
         }
}

function write_field(idname, text){
  document.getElementById(idname).value = text;
}

function open_belala(){
  void(window.open('index.php?start=true','Info','toolbar=no,width=800,height=534,left=400,top=120,status=no,menubar=no,resizable=no,scrollbars=no'));
}