function from onclick to external url iframe

Question

How to receive the parameters of an onclick when the link is in an external url iframe? on the same server does exactly what I need, already working with the help of a Stack user (dvd).

function this way:

         function funcao1(dom,seg,par){
        var converter = atob(par); // decodifica base64
        var decodif_url = decodeURIComponent(converter); // decodifica uri
        var parx = JSON.parse(decodif_url); 
        var parx = parx.nome; 
        var parx = btoa(parx); // recolocar apenas nome em base64 para URL
        var url_ = "http://www."+dom.toLowerCase()+".com/pesquisa.php?"+parx+"&segmento="+par;
        window.open(url_,"_blank"); // abre em nova guia
        }

link in EXTERNAL url iframe like this:

        <a href="#" onclick="javascript:parent.funcao1('TESTE','ABCD', 'JTdCJTIybm9tZSUyMiUzQSUyMmpvYW8lMjIlMkMlMjJpZGFkZSUyMiUzQSUyMjM3JTIyJTdE');">
                          <nobr>TESTE</nobr>
                       </a>