Javascript hide button

I need to know how to make an input button hidden from javascript.  I'm finding my input button by using the eval function

var obj = eval(Type + ID);

I then need to be able to say something like

if (Type == 'Sub')
   obj.visibility = 'hidden';
//make it visible

But this doesn't seem to work.

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not positive - try this: = 'hidden';

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Specs are your friends. Check to find out your CSS details.

Brunobear is correct. " = 'hidden';" will do the job as long as you want the button to still affect layout. (That is, if you want an empty space where the button would be if it was visible.)

If you don't want the empty space, " = 'none';" is what you are after.
and obj irepresents the name of your button, b_name in this example:

<input type="submit" name="b_name" value="OK" >
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