Changes

function undecided(){

var GDPR_table_undecided = document.createElement("table");

GDPR_table_undecided.setAttribute("id","GDPR_table_undecided");

GDPR_accept_button.appendChild(document.createTextNode("ACCEPT COOKIES"));

GDPR_reject_button.onclick=reject_cookies;

GDPR_accept_button.onclick=accept_cookies;

GDPR_table_undecided.appendChild(GDPR_row);

GDPR_reject_button.style.border="1px solid green";

GDPR_accept_button.style.border="1px solid green";

}

}