[html] Submit Button Image

I want to use a Submit Button Image instead of the standard Button. I searched on Google and SO and got a few different ways.

Which is the right way of using an Image as a Submit Button ?

Also i would want to add three states for the button - normal, hover, onclick

What i tried

HTML

<input type="submit" value="Subscribe">

CSS

input[type=submit] {
    background:url(../images/btn-subscribe.gif) none;
    text-indent:-9999px;
    width:109px;
    height:41px;
}

What shows up

What it should Display

<input type="image" src="path to image" name="submit" />

UPDATE:

For button states, you can use type="submit" and then add a class to it

<input type="submit" name="submit" class="states" />

Then in css, use background images for:

.states{
background-image:url(path to url);
height:...;
width:...;
}

.states:hover{
background-position:...;
}

.states:active{
background-position:...;
}

It's very important for accessibility reasons that you always specify value of the submit even if you are hiding this text, or if you use <input type="image" .../> to always specify alt="" attribute for this input field.

Blind people don't know what button will do if it doesn't contain meaningful alt="" or value="".

You have to remove the borders and add a background image on the input.

.imgClass { 
    background-image: url(path to image) no-repeat;
    width: 186px;
    height: 53px;
    border: none;
}

It should be good now, normally.

<INPUT TYPE="image" SRC="images/submit.gif" HEIGHT="30" WIDTH="173" BORDER="0" ALT="Submit Form">
Where the standard submit button has TYPE="submit", we now have TYPE="image". The image type is by default a form submitting button. More simple