(function() 
    { function t_ready(e) { "loading" != document.readyState ? e() :
     document.addEventListener ? document.addEventListener("DOMContentLoaded", e) 
     : document.attachEvent("onreadystatechange", (function() { "loading" != document.readyState && e() 

     } )) } t_ready(function() { setTimeout(function() { document.querySelectorAll('[href="#back"]').forEach(function(item) 
        { item.addEventListener("click", function(e) { e.preventDefault(); if ("https://eltech-tver.ru/" && 
            (!document.referrer.includes(window.location.host)||document.referrer == "")) 
            { window.location.href = "https://eltech-tver.ru/"; } 
else { history.go(-1); } }); }); }, 600); }); })()