Theme development

I have a drupal theme and I want to edit its html/css according to my need any body tell me how i can change it.(specific file name ?)

I have tried to change page.tpl.php but couldn't get any output .

Thanks

Hey guys,

I want a second navigation menu for pages like "Music", where it says things like "pricing", etc.

How can I add different Navigation to different pages? So that I only have the pricing on the Music page and the "Events" on the Concert page, etc.?

Hi, Let me know if there is possible to setup code in the file "template.php" to run aplication in the resolution of the page.

I'm having problems with my back-to-top button script.
JavaScript does not get loaded at all and the button is not working.
What I have done:
Created up.js file in sites/all/themes/MyTheme/js folder.
Code of my up.js is:

I have a "Content: All taxonomy terms" field in my view, and I'm overriding its output with a theme hook template. Works great.

But, now I want to combine this field with a few others within a wrapper div. So I exclude those fields from display, and I create a new "Global: Custom Text" field, build a div, and reference my content with replacement patterns.

When the view is displayed this way, my theme hook template is ignored. I get my original list of taxonomy terms.

I'm using omega theme. When i navigate to a node page (?q=node/13) it just show node title and no other content is showing.
I don't have this problem with other theme. I think it's a omega theme issue.
Thanks for any help and advise!