>>All it takes is an if condition. The problem is there are so many ways of doing this in PHP now. Do you in bead PHP code in the html (the old way) or are you doing this in PHP classes?
>>
>>

>>// in html 
>><input type="button" class="<?php  (some condition) ? 'class1' : 'class2' ?>" value="button name" />
>>

>>
>>Post some code If that doesn't work for you.
>
>Thank you, Jim
>Yes, I'm embedding the PHP code.
>I'll look into classes

If you mean to change style properties of objects at runtime, then jQuery is your friend. Check the .addClass(), .removeClass() (or equivalents thereof, it's been eight years since I was seriously playing with that). And the nice thing about jQuery is the selectors - you pretty much always work with a collection of objects fitting your selector, and you don't care how many of them are found (zero, one, many - just like in caveman's maths), you are still making one function call.