var btn = {
  init: function() {
    if (!document.getElementById || !document.createElement || !document.appendChild) return false;
    as = btn.getElementsByClassName('btn(.*)');
    for (i = 0; i < as.length; i++) {
      if (as[i].tagName == "INPUT" && (as[i].type.toLowerCase() == "submit" || as[i].type.toLowerCase() == "button")) {
        var a1 = document.createElement("a");
        a1.appendChild(document.createTextNode(as[i].value));
        a1.className = as[i].className;
        a1.id = as[i].id;
        as[i] = as[i].parentNode.replaceChild(a1, as[i]);
        as[i] = a1;
        as[i].style.cursor = "pointer";
      }
      else if (as[i].tagName == "A") {
        var tt = as[i].childNodes;
      }
      else { return false };
      var i1 = document.createElement('i');
      var i2 = document.createElement('i');
      var s1 = document.createElement('span');
      var s2 = document.createElement('span');
      s1.appendChild(i1);
      s1.appendChild(s2);
      while (as[i].firstChild) {
        s1.appendChild(as[i].firstChild);
      }
      as[i].appendChild(s1);
      as[i] = as[i].insertBefore(i2, s1);
    }
    // The following lines submits the form if the button id is "submit_btn"
    btn.addEvent(document.getElementById('submit_btn'), 'click', function() {
      var form = btn.findForm(this);
      form.submit();
    });
    // The following lines resets the form if the button id is "reset_btn"
    btn.addEvent(document.getElementById('reset_btn'), 'click', function() {
      var form = btn.findForm(this);
      form.reset();
    });
  },
  findForm: function(f) {
    while (f.tagName != "FORM") {
      f = f.parentNode;
    }
    return f;
  },
  addEvent: function(obj, type, fn) {
    if (obj.addEventListener) {
      obj.addEventListener(type, fn, false);
    }
    else if (obj.attachEvent) {
      obj["e" + type + fn] = fn;
      obj[type + fn] = function() { obj["e" + type + fn](window.event); }
      obj.attachEvent("on" + type, obj[type + fn]);
    }
  },
  getElementsByClassName: function(className, tag, elm) {
    var testClass = new RegExp("(^|\s)" + className + "(\s|$)");
    var tag = tag || "*";
    var elm = elm || document;
    var elements = (tag == "*" && elm.all) ? elm.all : elm.getElementsByTagName(tag);
    var returnElements = [];
    var current;
    var length = elements.length;
    for (var i = 0; i < length; i++) {
      current = elements[i];
      if (testClass.test(current.className)) {
        returnElements.push(current);
      }
    }
    return returnElements;
  }
}

btn.addEvent(window, 'load', function() { btn.init(); });