How to load external content into <div class="content">?

How to load external content into <div class="content">?

how can i use .load() or .get() to load external content into div?

i have code below but doesnt work? i dont know what is the problem.

    1. $(document).ready (function(){
                $("tabs1").click(function(){
                          $("content").load("about.php");
                });
    1. });