Please remove all occurences of <p> and </p> from the code -
<form action="
https://www.e-junkie.com/ecom/gb.php?c=cart&i=97258&cl=20200&ejc=2" target="ej_ejc" method="POST" accept-charset="UTF-8">
Hat Color:<br/></p>
<select name="o1">
<option value=""Goes With Everything" Black">"Goes With Everything" Black</option><br />
<option value=""I'm Versatile" Reversible Black/Orange">"I’m Versatile" Reversible Black/Orange</option><br />
<option value=""Notice How Fabulous I Am" Orange">"Notice How Fabulous I Am" Orange</option><br />
</select>
<p><br/></p>
<p style="text-align: center;">
<input type="image" src="
https://www.e-junkie.com/ej/ej_add_to_cart.gif" border="0" alt="Add to Cart" class="ec_ejc_thkbx" onClick="javascript:return EJEJC_lc(this.parentNode);"/>
</form>