function top_search(){
var txt_s = trim(document.getElementById('txt').value);
if (!txt_s) {
alert ('Вы не ввели критерии поиска');
document.getElementById('txt').select();
document.getElementById('txt').focus();
}
else document.getElementById('frm_top').submit(); 
}


function hideObject(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'pop';
}

function showObject(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'go';
}

    function trim(str) {return str.replace(/(^\s*)|(\s*$)/g,'')}

function hideObject2(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'pop';
}

function showObject2(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'go';
}