Vertical alignment of custom submit button

[son]

Why is it that when I use an image as a submit button, it is vertically above the input field instead of next to it? The code is:

<form action="#">  <label for="search">Search</label> <input type="text" width="20" /> <input type="submit" /> <input type="image" src="assets/go.gif" width="26" height="21" alt="Search" style="border:none;"></form>

The 'normal' input (is only in code to compare) is exactly next to input...Son