I recently re-factored what i had, so this is not that well tested or optimized. Here it is anyway:
/**
* Utility function to swap className on a jQuery object.
*
* @example $('p.foo').swapClass('foo', 'bar');
*
* @param {Object} c1 class name one.
* @param {Object} c2 class name two.
*/
jQuery.fn.swapClass = function(c1, c2){
return this.each (function(){
var t = jQuery(this);
(!t.is('.'+c1)) ?
t.addClass(c1).removeClass(c2) : t.addClass(c2).removeClass(c1);
});
}
/**
* jQuery plugin to add an accordian effect to any jQuery obj
* and selectable content within the same parent.
* requires a swapClass Plugin
*
* @param {_expression_} content: Required. Element to be paired with. Takes a jquery _expression_/object/dom element.
* @param {Object} options: Optional option object.
* {Integer} startIndex: Index of the initial pair to be shown.
* {String|Integer} speed: When given a speed the accordian animates in and out.
* {Function} callBack: CallBack function at the end of each toggle.
*/
jQuery.fn.accordian = function(content, options) {
if (!this[0]) return;
var options = jQuery.extend({
startIndex: 0,
speed: 0,
collapsible: false,
callBack: null
}, options || {});
var $parent = this.parent().addClass('accordian'),
$content = jQuery(content, $parent).hide(),
$self = this.end();
if(options.startIndex >= 0) jQuery($content[options.startIndex]).show();
return this.each(function(i){
jQuery(this).click(function(){
if (!jQuery(this).is('.open') && !options.collapsible){
$self.filter('.open').swapClass('open', 'close').end();
jQuery(this).swapClass('open', 'close');
var $closeObj = jQuery($content).filter(':visible'),
$openObj = jQuery($content).eq(i);
//$content.end();
if (options.speed) {
$closeObj.animate({'height': 'hide'}, options.speed, function(){
$openObj.animate({'height': 'show'}, options.speed, options.callBack);
});
} else {
$closeObj.hide(options.speed);
$openObj.show(options.speed, options.callBack);
}
}
});
});
}
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