(function ($, undefined){ 
$.effects.fold = function (o){ 
return this.queue(function (){ 
var el = $(this), props = ['position', 'top', 'bottom', 'left', 'right'] ; 
var mode = $.effects.setMode(el, o.options.mode || 'hide'); 
var size = o.options.size || 15; 
var horizFirst = !(!o.options.horizFirst); 
var duration = o.duration? o.duration / 2: $.fx.speeds._default / 2; 
$.effects.save(el, props); 
_AN_Call_show('show', el); 
var wrapper = $.effects.createWrapper(el).css({ 
overflow: 'hidden'}
); 
var widthFirst = ((mode == 'show') != horizFirst); 
var ref = widthFirst? ['width', 'height'] : ['height', 'width'] ; 
var distance = widthFirst? [wrapper.width(), wrapper.height()] : [wrapper.height(), wrapper.width()] ; 
var percent = /([0-9]+)%/.exec(size); 
if (percent) size = parseInt(percent[1], 10) / 100 * distance[mode == 'hide'? 0: 1]; 
if (mode == 'show') wrapper.css(horizFirst? { 
height: 0,
width: size}
: { 
height: size,
width: 0}
); 
var animation1 = { 
}
, animation2 = { 
}
; 
animation1[ref[0]] = mode == 'show'? distance[0]: size; 
animation2[ref[1]] = mode == 'show'? distance[1]: 0; 
wrapper.animate(animation1, duration, o.options.easing).animate(animation2, duration, o.options.easing, function (){ 
if (mode == 'hide') el.hide(); 
$.effects.restore(el, props); 
$.effects.removeWrapper(el); 
if (o.callback) o.callback.apply(el[0], arguments); 
el.dequeue(); 
} 
); 
} 
); 
} 
; 
} 
)(jQuery);