function change_search(form_id, field, type, value)
{
  var input_field = document.getElementById(field);
  if (type == 'checkbox')
  {
	  input_field.checked = value;
  }
  else if (type == 'selectbox')
  {
    input_field.selectedIndex = value;
  }
  else if (type == 'value')
  {
    input_field.value = value;
  }
  
  var form = document.getElementById(form_id);
	form.submit();
}