change button height  (property)

change button height  (property)

  
I'm assigning the default button style on preparation however when someone clicks on it, i want to change the look and disable it. 

It seems i can change the color and font but can't seem to change the height or disable it? 
height: 30 obviously is not working. 
@Eduardo - Well try the options which is based on MouseOver or CLICK 

Create a new CSS and apply to that particular Button or section 
or
<form method="POST" action="">
<input type="submit" value="Submit" name="submitBtn" onclick="this.disabled=true;this.form.submit();" >
</form>