Finds the button with no siblings in each matched div and modifies look.
<html> <head> <script type="text/javascript" src="js/jquery-1.3.2.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("div ul:only-child").text("only has ul").css("border", "2px blue solid"); }); </script> </head> <body> <body> <div> <ul> <li>A</li> <li>B</li> <li>C</li> </ul> </div> <div> <ul> <li>D</li> <li>E</li> <li>F</li> <li>G</li> </ul> </div> <div> <ul> <li>H</li> <li>I</li> <li>J</li> <li>K</li> </ul> </div> </body> </html>