diff --git a/Makefile b/Makefile
index 8d9d0c2..000392c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,23 +1,24 @@
 JS_ENGINE ?= `which node nodejs`
-ISO = jquery.isotope.js
-ISO_MIN = jquery.isotope.min.js
+JS = jquery.isotope.js
+JS_MIN = jquery.isotope.min.js
+SITE = isotope-site
 
 # minifies jquery.isotope.js
 # requires NodeJS and global uglify-js
 min: ${ISO}
 	@@if test ! -z ${JS_ENGINE}; then \
-		echo "Minifying" ${ISO}; \
-		uglifyjs ${ISO} > ${ISO_MIN}.tmp; \
-		echo ';' >> ${ISO_MIN}.tmp; \
-		sed 's/\*\//&§/; y/§/\n/;' ${ISO_MIN}.tmp > ${ISO_MIN}; \
-		rm ${ISO_MIN}.tmp; \
+		echo "Minifying" ${JS}; \
+		uglifyjs ${JS} > ${JS_MIN}.tmp; \
+		echo ';' >> ${JS_MIN}.tmp; \
+		sed 's/\*\//&§/g; y/§/\n/;' ${JS_MIN}.tmp > ${JS_MIN}; \
+		rm ${JS_MIN}.tmp; \
 	else \
 		echo "NodeJS required for minification."; \
 	fi
 
 # creates zip file of site
 zip: _site
-	mkdir isotope-site
-	cp -r _site/ isotope-site
-	zip -r ~/Desktop/isotope-site.zip isotope-site/
-	rm -rf isotope-site
\ No newline at end of file
+	mkdir ${SITE}
+	cp -r _site/ ${SITE}
+	zip -r ~/Desktop/${SITE}.zip ${SITE}/
+	rm -rf ${SITE}
\ No newline at end of file
diff --git a/_posts/demos/2011-05-22-category-rows.html b/_posts/demos/2011-05-22-category-rows.html
new file mode 100644
index 0000000..054a884
--- /dev/null
+++ b/_posts/demos/2011-05-22-category-rows.html
@@ -0,0 +1,159 @@
+---
+title: Category rows
+layout: demo
+category: demos
+related: layouts
+---
+
+<section id="copy">
+  <p>This demo uses a custom layout mode that arranges elements into columns based on an attribute.</p>
+</section>
+
+<section id="options" class="clearfix">
+
+  <h3>Filters</h3>
+
+  <ul id="filters" class="option-set floated clearfix">
+    <li><a href="#show-all" class="selected">show all</a></li>
+    <li><a href="#metalloid">metalloid</a></li>
+    <li><a href="#metal">metal</a></li>
+    <li><a href="#alkali">alkali</a></li>
+    <li><a href="#alkaline-earth">alkaline-earth</a></li>
+    <li><a href="#inner-transition">inner-transition</a></li>
+    <li><a href="#lanthanoid">lanthanoid</a></li>
+    <li><a href="#actinoid">actinoid</a></li>
+    <li><a href="#transition">transition</a></li>
+    <li><a href="#post-transition">post-transition</a></li>
+    <li><a href="#nonmetal">nonmetal</a></li>
+    <li><a href="#other">other</a></li>
+    <li><a href="#halogen">halogen</a></li>
+    <li><a href="#noble-gas">noble-gas</a></li>
+  </ul>
+
+  <h3>Etc</h3>
+
+  <ul id="etc" class="floated clearfix">
+    <li id="insert"><a href="#insert">Insert new elements</a></li>
+  </ul>
+</section> <!-- #options -->
+
+<div id="container" class="clearfix">
+  {% for elem_number in site.random_order | limit:60 %}
+    {% assign element = site.elements[elem_number] %}
+    {% include element-partial.html %}
+  {% endfor %}
+</div>
+
+<script src="../{{ site.jquery_js }}"></script>
+<script src="../{{ site.isotope_js }}"></script>
+<script src="../js/fake-element.js"></script>
+<script>
+
+  // categoryRows custom layout mode
+  $.extend( $.Isotope.prototype, {
+  
+    _categoryRowsReset : function() {
+      // reset namespace properties
+      this.categoryRows = {
+        rowIndex : 0,
+        // the x & y position in each row
+        position : {
+          x : this.posLeft,
+          y : this.posTop
+        }
+      };
+      this._getSegments('categoryRows', true);
+    
+      return this;
+    },
+  
+    _categoryRowsLayout : function( $elems ) {
+      var instance = this,
+          // namespaced properties
+          position = this.categoryRows.position,
+          sortBy = this.options.sortBy,
+          containerWidth = this.element.width(),
+          currentRowName, nextX;
+      $elems.each(function(){
+        var $this = $(this),
+            // get row based on function passed in options
+            rowName = $this.data('isotope-sort-data')[ sortBy ],
+            atomWidth = $this.outerWidth(true);
+        
+        // for new row
+        if ( !currentRowName ) {
+          currentRowName = rowName;
+        } else if ( currentRowName !== rowName ) {
+          instance._categoryRowsNewRow();
+          currentRowName = rowName;
+        }
+      
+        // if item doesn't fit on row
+        nextX = position.x + atomWidth;
+        if ( nextX >= containerWidth ) {
+          instance._categoryRowsNewRow();
+        }
+        
+        instance._pushPosition( $this, position.x, position.y );
+      
+        position.x += atomWidth;
+      
+      });
+    
+      return this;
+    },
+    
+    // convience method
+    _categoryRowsNewRow : function() {
+      var props = this.categoryRows;
+      props.position.x = this.posLeft;
+      props.position.y += props.rowHeight;
+    },
+  
+    _categoryRowsGetContainerSize : function() {
+      return { height: this.categoryRows.position.y + this.categoryRows.rowHeight };
+    },
+  
+    _categoryRowsResize : function() {
+      this.reLayout();
+    }
+  
+  });
+  
+  var $container = $('#container');
+
+  $('#filters').find('a').click(function(){
+    // get href attribute, minus the #, plus a . to make it a class
+    var filterName = '.' + $(this).attr('href').slice(1);
+    filterName = filterName === '.show-all' ? '*' : filterName;
+    $container.isotope({ filter: filterName })
+    return false;
+  });
+
+  {% include add-buttons.js %}
+
+  {% include option-buttons.js %}
+  
+
+  $(function(){
+
+    $container.isotope({
+      itemSelector : '.element',
+      layoutMode : 'categoryRows',
+      categoryRows : {
+        rowHeight : 120
+      },
+      getSortData : {
+        category : function( $elem ) {
+          return $elem.attr('data-category');
+        }
+      },
+      sortBy: 'category',
+      animationEngine : $.browser.opera ? 'jquery' : 'best-available'
+    });
+
+
+  });
+</script>
+  
+  
\ No newline at end of file