51help TIY
码：
<!DOCTYPE html> <html> <head> <script type="text/javascript" src="../jquery/jquery.js" tppabs="http://www.51help.tk/jquery/jquery.js"></script> <style> body { font-size:16px; font-weight:bolder; } p { margin:5px 0; } </style> </head> <body> <div> <span>Hello</span> <p class="selected">Hello Again</p> <div class="selected">And Again</div> <p>And One Last Time</p> </div> <script>$("div").children(".selected").css("color", "blue");</script> </body> </html>
查看结果: