gaowhen

var $win = $(window)
var $progress = $('.progress-indicator')
var wh = $win.height()
var h = $('body').height()
var scrollHeight = h - wh

$win.on('scroll', function () {
  var perc = Math.max(0, Math.min(1, $win.scrollTop() / scrollHeight))

  $progress.css({

gaowhen

function isElementInViewport (el) {

  //special bonus for those using jQuery
  if (typeof jQuery === "function" && el instanceof jQuery) {
    el = el[0]
  }

  var rect = el.getBoundingClientRect()

  return (

gaowhen

function random_int_between(min, max) {
  return Math.floor(Math.random() * (max -min + 1) + min);
}

gaowhen

function parseURL(url) {
    var a =  document.createElement('a');
    a.href = url;
    return {
        source: url,
        protocol: a.protocol.replace(':',''),
        host: a.hostname,
        port: a.port,
        query: a.search,
        params: (function(){

gaowhen

function safeString(string) {
    if(!string) {
        return "";
    }
    var escape = {
        "&": "&",
        "<": "&lt;",
        ">": "&gt;",
        '"': "&quot;",
        "'": "&#x27;",

gaowhen

function prefix_integer(num, length) {
  var len = length || 2;

  return (num / Math.pow(10, len)).toFixed(len).substr(2);
}