for some reason in ie8 the add to contact form is not going to checkout page only in ie8
here is my code
{exp:cartthrob:add_to_cart_form return="{path=registration}" no_tax='yes' no_shipping='yes' }
<fieldset>
<label>Price Option</label>
<select name="item_options[event-price]">
{event-price}
<option value="{option}">{option_name} {price}</option>
{/event-price}
</select><br />
<input type="hidden" name="quantity" value="" class="qty" />
<input type="hidden" name="entry_id" value="{entry_id}" />
</fieldset>
<button type="submit">Register</button>
{/exp:cartthrob:add_to_cart_form}
