(function($){
 $.fn.stoc = function(options) {
        //Our default options
        var defaults = {
                search: "body", //where we will search for titles
                depth: 6, //how many hN should we search
                start: 1, //which hN will be the first (and after it we go just deeper)
                stocTitle: "<h2>Contents</h2>", //what to display before our box
                listType: "ul", //could be ul or ol
                smoothScroll: 1 
        };
        
        //let's extend our plugin with default or user options when defined
        var options = $.extend(defaults, options);
        
    return this.each(function() {
                //"cache" our target and search objects
                obj = $(this); //target
                src = $(options.search); //search
                //let's declare some variables. We need this var declaration to create them as local variables (not global)
                var appHTML = "", tagNumber = 0, txt = "", id = "", before = "", after = "", previous = options.start, start = options.start, depth = options.depth, i = 0, srcTags = "h" + options.start, cacheHN = "";
                
                //which tags we will search
                while ( depth > 1) {
                        start++; //we will just get our start level and numbers higher than it
                        srcTags = srcTags + ", h" + start;
                        depth--; //since went one level up, our depth will go one level down
                }
                src.find(srcTags).each(function() {
                        //we will cache our current H element
                        cacheHN = $(this);
                        //if we are on h1, 2, 3...
                        tagNumber = ( cacheHN.get(0).tagName ).substr(1);                       
                        
                        //sets the needed id to the element
                        id = cacheHN.attr('id');
                        if (id == "") { //if it doesn't have only, of course
                                id = "h" + tagNumber + "_" + i;
                                cacheHN.attr('id', id);
                        }
                        //our current text
                        txt = cacheHN.text();
                        
                        switch(true) { //with switch(true) we can do comparisons in each case
                                case (tagNumber > previous) : //it means that we went down one level (e.g. from h2 to h3)
                                                appHTML = appHTML + "<" + options.listType +"><li>"+ before +"<a href=\"#"+ id + "\">" + txt + "</a>";
                                                previous = tagNumber;
                                        break;
                                case (tagNumber == previous) : //it means that stay on the same level (e.g. h3 and stay on it)
                                                appHTML = appHTML + "</li><li>"+ before +"<a href=\"#"+ id + "\">" + txt +  "</a>";
                                        break;
                                case (tagNumber < previous) : //it means that we went up but we don't know how much levels  (e.g. from h3 to h2)
                                                while(tagNumber != previous) {
                                                        appHTML = appHTML + "</" + options.listType +"></li>";
                                                        previous--;
                                                }
                                                appHTML = appHTML + "<li>"+ before +"<a href=\"#"+ id + "\">" + txt + "</a></li>";
                                        break;
                        }
                        i++;                    
                });
                //corrects our last item, because it may have some opened ul's
                while(tagNumber != options.start) {
                        appHTML = appHTML + "</" + options.listType +">";
                        tagNumber--;
                }
                //append our html to our object
                appHTML = options.stocTitle + "<"+ options.listType + ">" + appHTML + "</" + options.listType + ">";
                obj.append(appHTML);
                
                //our pretty smooth scrolling here
                // acctually I've just compressed the code so you guys will think that I'm the man . Source: http://css-tricks.com/snippets/jquery/smooth-scrolling/
                if (options.smoothScroll == 1) {
                        $(window).load(function(){
                                function filterPath(string){return string.replace(/^\//,'').replace(/(index|default).[a-zA-Z]{3,4}$/,'').replace(/\/$/,'')}var locationPath=filterPath(location.pathname);var scrollElem=scrollableElement('html','body');obj.find('a[href*=#]').each(function(){var thisPath=filterPath(this.pathname)||locationPath;if(locationPath==thisPath&&(location.hostname==this.hostname||!this.hostname)&&this.hash.replace(/#/,'')){var $target=$(this.hash),target=this.hash;if(target){var targetOffset=$target.offset().top;$(this).click(function(event){event.preventDefault();$(scrollElem).animate({scrollTop:targetOffset},400,function(){location.hash=target})})}}});function scrollableElement(els){for(var i=0,argLength=arguments.length;i<argLength;i++){var el=arguments[i],$scrollElement=$(el);if($scrollElement.scrollTop()>0){return el}else{$scrollElement.scrollTop(1);var isScrollable=$scrollElement.scrollTop()>0;$scrollElement.scrollTop(0);if(isScrollable){return el}}}return[]}
                        });
                }
    });
 };
})(jQuery);