Symbol before username problem

Hi this code that I inputted does not work, I tried to edit it; but to no avail.

Code:

$(function() {
if($('a[href="/u18"] span strong')){
            $('a[href="/u18"] span strong').before('<img src="http://i.imgur.com/PSCCv.png" border="0" />');
    }
});

Can someone please tell me what's wrong with this code and possibly fix it for me?

Code:

$(function() {
$('a[href=^"/u18"] span strong').before('<img src="http://i.imgur.com/PSCCv.png" border="0" />');
});

Not use "if (condition) { }"