function convertURIText(txt) {
    str = decodeURI(txt);
    str = unescape(str);
    return str;
};

var node;
node = document.getElementById("main").getElementsByTagName("h1");
for (i = 0; i < node.length; i++) {
    node[i].innerHTML = convertURIText(node[i].innerHTML);
}

node = document.getElementById("main").getElementsByTagName("h2");
for (i = 0; i < node.length; i++) {
    node[i].innerHTML = convertURIText(node[i].innerHTML);
}

node = document.getElementById("main").getElementsByTagName("h3");
for (i = 0; i < node.length; i++) {
    node[i].innerHTML = convertURIText(node[i].innerHTML);
}

node = document.getElementById("main").getElementsByTagName("h4");
for (i = 0; i < node.length; i++) {
    node[i].innerHTML = convertURIText(node[i].innerHTML);
}