(function($) {
    $.fn.tipsy = function(opts) {
        
            opts = $.extend({fade: false, gravity: 'n', title: 'title', fallback: '', html: false, trigger: 'hover'}, opts || {});
            var tip = null;

            if(opts.trigger == 'hover')
            {
                this.hover(function() {

                $.data(this, 'cancel.tipsy', true);

                var tip = $.data(this, 'active.tipsy');
                if (!tip) {
                    tip = $('<div class="tipsy"><div class="tipsy-inner"/></div>');
                    tip.css({position: 'absolute', zIndex: 100000});
                    $.data(this, 'active.tipsy', tip);
                }

                if ($(this).attr('title') || typeof($(this).attr('original-title')) != 'string') {
                    $(this).attr('original-title', $(this).attr('title') || '').removeAttr('title');
                }

                var title;
                if (typeof opts.title == 'string') {
                    title = $(this).attr(opts.title == 'title' ? 'original-title' : opts.title);
                } else if (typeof opts.title == 'function') {
                    title = opts.title.call(this);
                }

                tip.find('.tipsy-inner')[opts.html ? 'html' : 'text'](title || opts.fallback);

                var pos = $.extend({}, $(this).offset(), {width: this.offsetWidth, height: this.offsetHeight});
                tip.get(0).className = 'tipsy'; // reset classname in case of dynamic gravity
                tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);
                var actualWidth = tip[0].offsetWidth, actualHeight = tip[0].offsetHeight;
                var gravity = (typeof opts.gravity == 'function') ? opts.gravity.call(this) : opts.gravity;

                switch (gravity.charAt(0)) {
                    case 'n':
                        tip.css({top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-north');
                        break;
                    case 's':
                        tip.css({top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-south');
                        break;
                    case 'e':
                        tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}).addClass('tipsy-east');
                        break;
                    case 'w':
                        tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}).addClass('tipsy-west');
                        break;
                }

                if (opts.fade) {
                    tip.css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: 0.8});
                } else {
                    tip.css({visibility: 'visible'});
                }

                }, function() {
                    $.data(this, 'cancel.tipsy', false);
                    var self = this;
                    setTimeout(function() {
                        if ($.data(this, 'cancel.tipsy')) return;
                        var tip = $.data(self, 'active.tipsy');
                        if (opts.fade) {
                            tip.stop().fadeOut(function() { $(this).remove(); });
                        } else {
                            tip.remove();
                        }
                    }, 100);

                });
            }
            if(opts.trigger == 'click')
            {
                this.click(function() {
                    if (!$.data(this, 'cancel.tipsy')){
                        $.data(this, 'cancel.tipsy', true);

                        var tip = $.data(this, 'active.tipsy');
                        if (!tip) {
                            tip = $('<div class="tipsy"><div class="tipsy-inner"/></div>');
                            tip.css({position: 'absolute', zIndex: 100000});
                            $.data(this, 'active.tipsy', tip);
                        }

                        if ($(this).attr('title') || typeof($(this).attr('original-title')) != 'string') {
                            $(this).attr('original-title', $(this).attr('title') || '').removeAttr('title');
                        }

                        var title;
                        if (typeof opts.title == 'string') {
                            title = $(this).attr(opts.title == 'title' ? 'original-title' : opts.title);
                        } else if (typeof opts.title == 'function') {
                            title = opts.title.call(this);
                        }

                        tip.find('.tipsy-inner')[opts.html ? 'html' : 'text'](title || opts.fallback);

                        var pos = $.extend({}, $(this).offset(), {width: this.offsetWidth, height: this.offsetHeight});
                        tip.get(0).className = 'tipsy'; // reset classname in case of dynamic gravity
                        tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);
                        var actualWidth = tip[0].offsetWidth, actualHeight = tip[0].offsetHeight;
                        var gravity = (typeof opts.gravity == 'function') ? opts.gravity.call(this) : opts.gravity;

                        switch (gravity.charAt(0)) {
                            case 'n':
                                tip.css({top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-north');
                                break;
                            case 's':
                                tip.css({top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-south');
                                break;
                            case 'e':
                                tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}).addClass('tipsy-east');
                                break;
                            case 'w':
                                tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}).addClass('tipsy-west');
                                break;
                        }

                        if (opts.fade) {
                            tip.css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: 0.8});
                        } else {
                            tip.css({visibility: 'visible'});
                        }
                    }
                    else{
                        $.data(this, 'cancel.tipsy', false);
                        var self = this;
                        setTimeout(function() {
                        if ($.data(this, 'cancel.tipsy')) return;
                            var tip = $.data(self, 'active.tipsy');
                            if (opts.fade) {
                                tip.stop().fadeOut(function() {$(this).remove();});
                            } else {
                                tip.remove();
                            }
                        }, 100);
                    }


                });
            }

            if(opts.trigger == 'focus')
            {
                this.focus(function() {

                $.data(this, 'cancel.tipsy', true);

                var tip = $.data(this, 'active.tipsy');
                if (!tip) {
                    tip = $('<div class="tipsy"><div class="tipsy-inner"/></div>');
                    tip.css({position: 'absolute', zIndex: 100000});
                    $.data(this, 'active.tipsy', tip);
                }

                if ($(this).attr('title') || typeof($(this).attr('original-title')) != 'string') {
                    $(this).attr('original-title', $(this).attr('title') || '').removeAttr('title');
                }

                var title;
                if (typeof opts.title == 'string') {
                    title = $(this).attr(opts.title == 'title' ? 'original-title' : opts.title);
                } else if (typeof opts.title == 'function') {
                    title = opts.title.call(this);
                }

                if(title == '')
                {
                    $.data(this, 'cancel.tipsy', false);
                    return;
                }

                tip.find('.tipsy-inner')[opts.html ? 'html' : 'text'](title || opts.fallback);

                var pos = $.extend({}, $(this).offset(), {width: this.offsetWidth, height: this.offsetHeight});
                tip.get(0).className = 'tipsy'; // reset classname in case of dynamic gravity
                tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);
                var actualWidth = tip[0].offsetWidth, actualHeight = tip[0].offsetHeight;
                var gravity = (typeof opts.gravity == 'function') ? opts.gravity.call(this) : opts.gravity;

                switch (gravity.charAt(0)) {
                    case 'n':
                        tip.css({top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-north');
                        break;
                    case 's':
                        tip.css({top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-south');
                        break;
                    case 'e':
                        tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}).addClass('tipsy-east');
                        break;
                    case 'w':
                        tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}).addClass('tipsy-west');
                        break;
                }

                if (opts.fade) {
                    tip.css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: 0.8});
                } else {
                    tip.css({visibility: 'visible'});
                }

                });

                this.blur(function() {
                    $.data(this, 'cancel.tipsy', false);
                    var self = this;
                    setTimeout(function() {
                        if ($.data(this, 'cancel.tipsy')) return;
                        var tip = $.data(self, 'active.tipsy');
                        if (opts.fade) {
                            tip.stop().fadeOut(function() { $(this).remove(); });
                        } else {
                            tip.remove();
                        }
                    }, 100);

                });
            }
        
    };
    
    $.fn.tipsy.autoNS = function() {
        return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
    };
    
    $.fn.tipsy.autoWE = function() {
        return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
    };

})(jQuery);