using single style class for enabled and disabled button

Question

I have a button which is using a class formBtn

in css

.formBtn {color:#fff; background-color:#518ACD; border-color:#ccc #000 #000 #ccc; font-    size:11px; font-weight:bold;}

in HTML

<html:submit styleClass="formBtn" value="Add"/>

Suggest me something so that I can use the same class name for a disabled button and show it in a different manner (say background-color:Grey). I may be using the style class like this

in HTML

<html:submit styleClass="formBtn" value="Disabled Add" disabled="true"/>

Answer 1

Use the :disabled pseudoclass.

.formBtn:disabled { background-color: grey; } 

Answer 2

[attribute=value] selector should work IE7, don't know about IE6 if you care.

.formBtn[disabled=true] { background: gray}

If you have "Disabled" word in values you could do something like:

.formBtn[value~=Disabled] { background: gray}