function radiochecked(ques,answ) {
document.getElementById("answer_"+ques+"_a").className="radio_unchecked";
document.getElementById("answer_"+ques+"_b").className="radio_unchecked";
document.getElementById("answer_"+ques+"_c").className="radio_unchecked";
document.getElementById("answer_"+ques+"_d").className="radio_unchecked";
document.getElementById("answer_"+ques+"_"+answ).className="radio_checked";
}

function changeClass(name) {
document.getElementById(name).className="input_onfocus";
}

function changeClassBack(name) {
document.getElementById(name).className="input";
}

function redirect(name,destination) {
if (name == "") {
} else {
document.getElementById(name).disabled=true;
}
window.location = destination;
}

function openwindow(url,name,specs) {
  var replace = "";
  window.open(url,name,specs,replace);
}