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// Zepto.js
// (c) 2010-2012 Thomas Fuchs
// Zepto.js may be freely distributed under the MIT license.
;(function($, undefined){
var document = window.document, docElem = document.documentElement,
origShow = $.fn.show, origHide = $.fn.hide, origToggle = $.fn.toggle
function anim(el, speed, opacity, scale, callback) {
if (typeof speed == 'function' && !callback) callback = speed, speed = undefined
var props = { opacity: opacity }
if (scale) {
props.scale = scale
el.css($.fx.cssPrefix + 'transform-origin', '0 0')
}
return el.animate(props, speed, null, callback)
}
function hide(el, speed, scale, callback) {
return anim(el, speed, 0, scale, function(){
origHide.call($(this))
callback && callback.call(this)
})
}
$.fn.show = function(speed, callback) {
origShow.call(this)
if (speed === undefined) speed = 0
else this.css('opacity', 0)
return anim(this, speed, 1, '1,1', callback)
}
$.fn.hide = function(speed, callback) {
if (speed === undefined) return origHide.call(this)
else return hide(this, speed, '0,0', callback)
}
$.fn.toggle = function(speed, callback) {
if (speed === undefined || typeof speed == 'boolean')
return origToggle.call(this, speed)
else return this.each(function(){
var el = $(this)
el[el.css('display') == 'none' ? 'show' : 'hide'](speed, callback)
})
}
$.fn.fadeTo = function(speed, opacity, callback) {
return anim(this, speed, opacity, null, callback)
}
$.fn.fadeIn = function(speed, callback) {
var target = this.css('opacity')
if (target > 0) this.css('opacity', 0)
else target = 1
return origShow.call(this).fadeTo(speed, target, callback)
}
$.fn.fadeOut = function(speed, callback) {
return hide(this, speed, null, callback)
}
$.fn.fadeToggle = function(speed, callback) {
return this.each(function(){
var el = $(this)
el[
(el.css('opacity') == 0 || el.css('display') == 'none') ? 'fadeIn' : 'fadeOut'
](speed, callback)
})
}
})(Zepto)
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