function getSize(){
  var agt = navigator.userAgent.toLowerCase();
  var ie = ((agt.indexOf ("msie") != -1)&&(agt.indexOf ("opera") == -1));
  var h = (self.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || 0) - 100;
  var delta = ie?650:670;
  document.getElementById('gallery_div').style.height = (h < delta?delta:h) - 40 + 'px';
}

function setLang(lang){
  if(lang == 'ru_lang'){
    document.getElementById('eng_lang').style.display = 'none';
    document.getElementById('eng_lang_link').className = 'lang';
    document.getElementById('ru_lang').style.display = 'block';
    document.getElementById('ru_lang_link').className = 'lang cur_lang';
  }else{
    document.getElementById('ru_lang').style.display = 'none';
    document.getElementById('ru_lang_link').className = 'lang';
    document.getElementById('eng_lang').style.display = 'block';
    document.getElementById('eng_lang_link').className = 'lang cur_lang';
  }
}