How to change button style/image?

I'd like to improve the appearance of three buttons on an html page. i believe this is the code:

<input type="submit" name="purchase" value="Use Remaining Credits" style="margin:7px 0" style="padding:1px 2px 1px 2px" rel="gb_page_center[600, 635] ">
<input type="button" name="search" value="Get New Credits" onclick="window.location.href='newcredits.php';" style="margin:7px 0" style="padding:1px 2px 1px 2px">
<input type="button" name="search" value="Search Again Now" onclick="window.location.href='page.php??page=12';" style="margin:7px 0" style="padding:1px 2px 1px 2px">

How can I add more attractive buttons, which would include the text "Use Remaining Credits", etc.? can you give me a code example?
Thanks

 

jQuery UI should be enough for a while.

 

I have no idea what you're trying to tell me

 

Sad. Haven't you heard about Google, too ?

 

Any other help would be appreciated.