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 != null) {
                        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();
} );