function element_initial_text(element, init_value){
  if(element.value == init_value){
    element.value = '';
  }
}

function header_form_submit(form_id){
  $('#' + form_id)[0].submit();
}

function column_height_set(main_id, col_id){
  var main_elem = $('#' + main_id)[0];
  var col_elem = $('#' + col_id)[0];
  if(main_elem.offsetHeight > col_elem.offsetHeight){
    col_elem.style.height = main_elem.offsetHeight + 'px';
  }
}