var str='<link rel="stylesheet" href="https://termin24.pl/widget/style.css" />';
var str2 = '<div id="termin24_termin24_popup_out" style="display:none"><div id="termin24_popup"><iframe src="https://psycholog.termin24.pl/?iframe=1"></iframe></div><div id="termin24_close">Zamknij</div></div>';
var html = document.getElementsByTagName('head')[0].innerHTML;
document.getElementsByTagName('head')[0].innerHTML=html+str;
var html2 = document.getElementsByTagName('body')[0].innerHTML;
document.getElementsByTagName('body')[0].innerHTML=html2+str2;

document.getElementById("termin24_modal_open").onclick = showTermin24Modal;
document.getElementById("termin24_close").onclick = hideTermin24Modal;

function showTermin24Modal() {
    document.getElementById('termin24_termin24_popup_out').style.display = "block";
    return false;
}
function hideTermin24Modal() {
    document.getElementById('termin24_termin24_popup_out').style.display = "none";
    return false;
}