Bascially i use firebug to design and make changes in the browser for all my CSS before i actually go forth and do it. Now today i went through and decided thru and added a new add to cart button. So i fired up the browser i turned on firebug to check to see what div its in and the styling of hat element.

Here is my problem: I cant find where this piece of code is located:

HTML Code:
<div id="cartAdd">
Add to Cart:
<input type="text" size="4" maxlength="6" value="1" name="cart_quantity">
<br>
<br>
<input type="hidden" value="139" name="products_id">
<input type="image" title=" Add to Cart " alt="Add to Cart" src="includes/templates/template_default/buttons/english/button_in_cart.gif">
</div>
This is located in HTML and not the PHP files it seems. But i cant find where the actually HTML is stored. Reasoning behind this is i want to take out the two breaks and i want to change the location of the button as the button i have is not a gif.

Please help its driving me nuts. Ive searched her on the forum and even gone as far as using the developer tools built into the car and haven't found them.