// JavaScript Document

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

document.getElementsByClassName = function(name) {
  var results = new Array();
  var elems = document.getElementsByTagName("*");
  for (var i=0; i<elems.length; i++) {
    if (elems[i].className.indexOf(name) != -1) {
      results[results.length] = elems[i];
    }
  }
  return results;
};

function addClass(element, value) {
	if (!element.className) {
		element.className = value;
	} else {
		newClassName = element.className;
		newClassName+= " ";
		newClassName+= value;
		element.className = newClassName;
	}
}

function removeClass(element, value) {
	var thisclass = " " + value;
	if (findWord(thisclass, element.className)) {
		var newClassName = element.className.split(thisclass)[0] + " " + element.className.split(thisclass)[1];
	}
	element.className = newClassName;
}

function findWord(needle, haystack) {
	return haystack.match(needle + "\\b");
}