<button type="submit"> in Modern theme

[Adyyda]

Can anyone tell me where the submit button is constructed?

We have for instance in login area only this code

Code: [Select]

<button type="submit"><?php _e("Log in", 'modern');?></button> which is complicated into

<div class="button" style="-moz-user-select: none;">
<span>
Log in
<button type="submit">Log in</button>
</span>
</div>

which in fact are 2 buttons and 1 has absolute position, outside of container

Code: [Select]

div.button a, div.button button, div.button input {
    position: absolute;
    top: -9999px;

[Adyyda]

Anyone? This is theme related because in modern is not constructed like this. Problem is i can't find in which file is done.