if (window.$) {
  $.fn.int = function() { return parseInt($(this).val(),10) }
  $.fn.float = function() { return parseFloat($(this).val()) }
  $.fn.string = function() { return trim($(this).val()) }
  $.fn.enable = function() { return $(this).attr("disabled",null) }
  $.fn.disable = function() { return $(this).attr("disabled","disabled") }
  $.fn.sanitize = function(s) { return trim(sanitize($(this).val())) }
  $.fn.stripHTML = function(s) { return trim(stripHTML($(this).val())) }
  $.fn.sanitizeName = function(s) { return trim(sanitizeName($(this).val())) }
  $.fn.htmlSafe = function(s) { return $(this).html(sanitize(s)) }
  $.fn.toDollars = function(i) { return $(this).html((i/100).toFixed(2)) }
}

function trim (s){ return s.replace(/^\s+/,"").replace(/\s+$/,"") }
function sanitize (s){ return (s || "").replace(new RegExp("[<>&]", 'g'), "") }
function sanitizeName (s){ return (s || "").replace(new RegExp("[^-_a-zA-Z0-9]", 'g'), "") }
function stripHTML (s){ return (s || "").replace(/<[^>]+>/g, "") }
function sanitizeHTML (s){ return (s || "").replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;") }
function capitalize (s){ return s.split(" ").map(capitalizeWord).join(" ") }
function capitalizeWord (s){ return s.charAt(0).toUpperCase() + s.slice(1) }
function slugify (s){ return (s || "").toLowerCase().replace(/\s/g,"-").replace(/[^-_a-zA-Z0-9]/g, '-').replace(/-+/g,"-") }
function rgb_string (rgb) { return "rgb(" + rgb.map(Math.round).join(",") + ")" }
function rgba_string (rgb,a) { return "rgba(" + rgb.map(Math.round).join(",") + "," + a + ")" }
function hex_string (rgb) { return "#" + rgb.map(Math.round).map(function(n){ var s = n.toString(16); return s.length == 1 ? "0"+s : s }).join("") }
function parse_rgba_string (s) { return s.match(/(\d+)/g).slice(0,3) }

function title_case (str) {
  return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}
function pluralize (n,s,ss) { return n + " " + s + ( n == 1 ? "" : (ss || "s") ) }
function as_cash(n){
  var cents = ((n*100) % 100);
  if (cents < 10) { cents = "0" + (cents|0) }
  else { cents = cents|0 }
  return "$" + (n|0) + "." + cents
}

var E = Math.E
var PI = Math.PI
var PHI = (1+Math.sqrt(5))/2
var TWO_PI = PI*2
var HALF_PI = PI/2
var LN10 = Math.LN10
function clamp(n,a,b){ return n<a?a:n<b?n:b }
function norm(n,a,b){ return (n-a) / (b-a) }
function lerp(n,a,b){ return (b-a)*n+a }
function mix(n,a,b){ return a*(1-n)+b*n }
function abs(n){ return Math.abs(n) }
function sign(n){ return n ? Math.abs(n)/n : 0 }
function random(){ return Math.random() }
function rand(n){ return (Math.random()*n) }
function randint(n){ return rand(n)|0 }
function randrange(a,b){ return a + rand(b-a) }
function choice(a){ return a[randint(a.length)] }
function noop(){}

function range(m,n,s){
	var a = []
	s = s || 1
	for (var i = m; i <= n; i += s) {
		a.push(i)
	}
	return a
}

function defaults (dest, src) {
	dest = dest || {}
	for (var i in src) {
		dest[i] = typeof dest[i] == 'undefined' ? src[i] : dest[i]
	}
	return dest
}

function pairs(h){
	var a = []
	for (var i in h) {
		if(h.hasOwnProperty(i)) {
			a.push([i, h[i]])
		}
	}
	return a
}
function invert_hash (h) {
	var k = {}
	for (var i in h) { if (h.hasOwnProperty(i)) k[h[i]] = i }
	return k
}
function filenameFromUrl (url) {
  var partz = url.split( "/" )
  return partz[partz.length-1].split(".")[0]
}

// Function.bind polyfill
if (!Function.prototype.bind) {
  Function.prototype.bind = function(oThis) {
    if (typeof this !== 'function') {
      // closest thing possible to the ECMAScript 5
      // internal IsCallable function
      throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
    }

    var aArgs   = Array.prototype.slice.call(arguments, 1),
        fToBind = this,
        fNOP    = function() {},
        fBound  = function() {
          return fToBind.apply(this instanceof fNOP && oThis
                 ? this
                 : oThis,
                 aArgs.concat(Array.prototype.slice.call(arguments)));
        };

    fNOP.prototype = this.prototype;
    fBound.prototype = new fNOP();

    return fBound;
  };
}

// rAF polyfill
(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];
    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
        window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
        window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] 
                                   || window[vendors[x]+'CancelRequestAnimationFrame'];
    }
 
    if (!window.requestAnimationFrame)
        window.requestAnimationFrame = function(callback, element) {
            var currTime = new Date().getTime();
            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
            var id = window.setTimeout(function() { callback(currTime + timeToCall); }, 
              timeToCall);
            lastTime = currTime + timeToCall;
            return id;
        };
 
    if (!window.cancelAnimationFrame)
        window.cancelAnimationFrame = function(id) {
            clearTimeout(id);
        };
}());

// Identify browser based on useragent string
(function( ua ) {
  ua = ua.toLowerCase();
  var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
    /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
    /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
    /(msie) ([\w.]+)/.exec( ua ) ||
    ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
    [];
  var matched = {
    browser: match[ 1 ] || "",
    version: match[ 2 ] || "0"
  };
  browser = {};
  if ( matched.browser ) {
      browser[ matched.browser ] = true;
      browser.version = matched.version;
  }
  // Chrome is Webkit, but Webkit is also Safari.
  if ( browser.chrome ) {
    browser.webkit = true;
  } else if ( browser.webkit ) {
    browser.safari = true;
  }
  if (window.$) $.browser = browser;
  return browser;
})( navigator.userAgent );

// Naive useragent detection pattern
var is_iphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
var is_ipad = (navigator.userAgent.match(/iPad/i))
var is_android = (navigator.userAgent.match(/Android/i))
var is_mobile = is_iphone || is_ipad || is_android
var is_desktop = ! is_mobile;
var transformProp = browser.safari ? "WebkitTransform" : "transform";
if (is_android) {
  document.body.parentNode.classList.add("android")
}
else {
  document.body.parentNode.classList.add("ios")
}

function selectElementContents(el) {
  if (window.getSelection && document.createRange) {
    var sel = window.getSelection();
    var range = document.createRange();
    range.selectNodeContents(el);
    sel.removeAllRanges();
    sel.addRange(range);
  } else if (document.selection && document.body.createTextRange) {
    var textRange = document.body.createTextRange();
    textRange.moveToElementText(el);
    textRange.select();
  }
}