/**

 * @author Roger Wu

 * @version 1.0

 */

function S4() {

    return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);

}

(function ($) {

    $.extend($.fn, {

        jPanel: function (options) {

            var op = $.extend({ header: "panelHeader", headerC: "panelHeaderContent", content: "panelContent", coll: "collapsable", exp: "expandable", footer: "panelFooter", footerC: "panelFooterContent" }, options);

            return this.each(function () {

                var $panel = $(this);

                var close = $panel.hasClass("close");

                var collapse = $panel.hasClass("collapse");

                var $content = $(">div", $panel).addClass(op.content);

                var title = $(">h1", $panel).wrap('<div class="' + op.header + '"><div class="' + op.headerC + '"></div></div>');

                var buttonid = "panel_" + S4();

                if (collapse) $("<a id=\"" + buttonid + "\" href=\"\"></a>").addClass(close ? op.exp : op.coll).insertAfter(title);

                var header = $(">div:first", $panel);

                var footer = $('<div class="' + op.footer + '"><div class="' + op.footerC + '"></div></div>').appendTo($panel);

                var defaultH = $panel.attr("defH") ? $panel.attr("defH") : 0;

                var minH = $panel.attr("minH") ? $panel.attr("minH") : 0;

                if (close)

                    $content.css({

                        height: "0px",

                        display: "none"

                    });

                else {

                    if (defaultH > 0)

                        $content.height(defaultH + "px");

                    else if (minH > 0) {

                        $content.css("minHeight", minH + "px");

                    }

                }

                if (!collapse) return;

                var $pucker = $("#" + buttonid);

                var inH = $content.innerHeight() - 6;

                if (minH > 0 && minH >= inH) defaultH = minH;

                else defaultH = inH;

                $pucker.click(function () {

                    if ($pucker.hasClass(op.exp)) {

                        $content.jBlindDown({

                            to: defaultH, call: function () {

                                $pucker.removeClass(op.exp).addClass(op.coll);

                                if (minH > 0) $content.css("minHeight", minH + "px");

                            }

                        });

                    } else {

                        if (minH > 0) $content.css("minHeight", "");

                        if (minH >= inH) $content.css("height", minH + "px");

                        $content.jBlindUp({

                            call: function () {

                                $pucker.removeClass(op.coll).addClass(op.exp);

                            }

                        });

                    }

                    return false;

                });

            });

        }

    });

})(jQuery);