This article describes how to use an image in place of the standard Submit button in a form.
When you want to submit a form with a text link instead of the normal form submit button:
Create an image with the text you want to use.
Use the <input type=”image” tag instead of the <input type=”submit” tag. The image you use will be the image you just created.
The <input type=”image” tag looks something like this:
<input type=“image” name=“myclicker” src=“image.jpg” width=“55” height=“22”>
Notice that the scr=, width=, and height= attributes are the same as they would be in an <img… tag. The <input type=”image” tag can also contain positioning attributes like the <img… tag can.