Howdy,
jQuery’s noConflict() method is used to relinquish jQuery’s control of the $ variable.
You might want to do this if another JavaScript library you are using wants use $ as a function or variable name.
The correct order to include your scripts when using noConflict() is:
jQuery
noConflict code
libraries which need to overridethe $ variable
In your case that would probably be:
<script src="js/jquery-1.7.2.min.js"></script>
<script src="js/jquery.anchor.js" type="text/javascript"></script>
<script type="text/javascript">jQuery.noConflict();</script>
<script src="js/lightbox.js"></script>
This is assuming that jquery.anchor.js wants to use the $ variable, but lightbox.js wants to override it.
Please also be aware that after your no conflict code you wouldn’t write $("#content"), but jQuery("#content").
You can also do this: $j = jQuery.noConflict(true);, which means you can then write $j("#content").
HTH
P.S. Please be aware that it is not a good idea to include two different versions of jQuery as you had done in your original code. It is also quite possible that this is causing you problems, too.