Drupal 7.x

According to Drupal 7 document and most of the google results, all the variables should be in Drupal.settings. but I still have "undefined" error. Thanks for your help.

php code:

	drupal_add_js(array('my_variabls' => 'test'), 'setting');
	drupal_add_js('test.js');

test.js code:

I have taken over managing my own site, but am an absolute novice.
I am planning to upgrade my site which is here. It was written for me, in Drupal 6, using a theme which I gather is based on Zen.
I have made a test site, and upgraded it to Drupal 7 successfully, but there is no update for the original theme.
Can anyone tell me how to find a theme which is similar in function to the old one? Or, is there some simple way to review how themes will look?
Thanks,
BK

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