My add to cart button doesn't display properly

I am new to everything and I am using Constructor 1.2.1. I am having trouble with the appearance of my add to cart button which came as a code snippet from another website. The style sheet must be overriding my html, but how do I override the stylesheet? The page displaying the buttons is

This is the code snippet

`<TABLE BORDER=”0″ CELLPADDING=”4″ CELLSPACING=”2″ WIDTH=”100%”>
<TR><TD>
<FORM ACTION=”https://www.securepay.com/easyshop/addprod.asp?mMerch_ID=68813&#8243; METHOD=”POST”>
<INPUT TYPE=”HIDDEN” NAME=”fproductid” value=”14″>
<FONT Size=2 > <B>Solid Burgundy Sofa Slipcover</B></FONT>
Price: $ 47.00</font> Quantity:
<INPUT MAXLENGTH=”4″ NAME=”fquantity” SIZE=”4″ VALUE=”1″>
<INPUT TYPE=”HIDDEN” NAME=”fReturnURL” VALUE=”https://www.theslipcoverplace.com”&gt;

<INPUT TYPE=”SUBMIT” VALUE=”Add to Cart” NAME=”ORDER”>
</form>
</td></tr>
</table>’

If you paste this snippet onto a page with no stylesheet, it displays very differently.

Basically, how do you override the CSS?