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 hideObject4(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'pop4';
}

function showObject4(num) {
  var div_num = 'div'+num;
  document.getElementById(div_num).className = 'go4';
}

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

function window_open(url,sizex,sizey,r,scrollb,titlepage) {
var r,titlepage,scrollb;
//r=Math.round(Math.random() * 10000);
window.open (url, r, 'Toolbar=0, Titlebar=0, Location=0, Directories=0, Status=0, Menubar=0, Scrollbars=1, Resizable=0, Copyhistory=1, width='+sizex+',height='+sizey);
}