Submit button does not appear in Firefox but on Chrome and Internet Explorer

Like the title says, this does not appear on Firefox:

<form class = "form-buy" action="buy-form.php" method="post">
    <input name="lp_current" type="hidden" id="lp-current2">
    <input name="server_current" type="hidden" id="server-current2">
    <input name="amount" type="hidden" value="" id="divisions-cost">
    <input name="discount_amount" type="hidden" value="" id="divisions-cost-discount">
    <input name="discount_rate" type="hidden" value="" id="divisions-discount-rate">
    <input name="item_name" type="hidden" id="divisions-item-name" value="">
    <input name="submit" type="submit"  value="Buy Boost" id="divisions-buy-button">
</form>

My other submit button for my other form works on Firefox, however:

form id="contactform" name="contactform" class="contactform" action="contact.php" method="post" onsubmit="return validate('contactform');">
    <label class = "col1 first" for="sender"><font color=red>*</font>E-mail:</label>
    <input class = "col4" type="text" name="sender" id="sender"  />
    <div class="clearfix"></div>
    <label class = "col1 first" for="IGN">IGN:</label>
    <input class = "col4" type="text" name="IGN" id="IGN" />
    <div class="clearfix"></div>
    <label class="col1 first" for="message"><font color=red>*</font>Message:</label>
    <textarea class="col5" rows="5" name="message" id="message"></textarea>
    <input type="submit" value = "submit" />
</form>

Okay, so I tried the closing tags, and turns out that the submit button is hiding under some text and an image.