append once with jQuery
<p>I have a function where I append an element to another element:</p>

<pre><code>$("#frmUrl").addClass("hideUrl").css("margin","0").append('&amp;nbsp;&lt;span class="uico ui-icon-carat-1-w icoSpan"&gt;&lt;/span&gt;');
</code></pre>

<p>Naturally, when I call the same function again, another  is appended. How can I rewrite this string to append this span only one?</p>
