<p class="p">This is a paragraph</p><!-- 類選擇符 --> <div class="p">This is a div element</div><!-- 類選擇符 --> <p class="urgent warning">This is a paragraph</p><!-- 多類選擇符，一個class可以包含一個詞列表，各個詞之間用空格隔開 --> <p class="urgent warning help">Those words's background-color is red too in all browser!</p><!-- 多類選擇符，.waring.urgent選擇器將不能匹配這里的p --> <p class=" help ie6">Those words's background-color is red in browser ie6!</p><!-- 多類選擇符，由于help在選擇器中最后出現，所以在IE6中背景為紅色的 --> <p class="help">Those words's background-color is red in browser ie6!</p><!-- 類選擇符，由于help在選擇器中最后出現，所以在IE6中背景為紅色的 --> <p>This is a paragraph<span class="warning"> But this is a span element</span></p>
