d = document;

tsel = 1;

function changeTag(n) {
	if (n == tsel) return;
	d.getElementById('t'+tsel).className = (tsel != 4) ? '' : 'l';
	d.getElementById('tr'+tsel).style.display = 'none';
	d.getElementById('t'+n).className = 's'
	document.getElementById('tr'+n).style.display = 'block';
	tsel = n;
}

function searchSubmit(form, field) {
   if ( d.site_search.search.value < 1 || d.site_search.search.value == 'Поиск') {
      alert('Введите поисковую фразу');
      return false;
   }
   return true;
}