Constant problem in IE

[ReeD]

I've run into a problem with constants in IE:

const MODAL_OVERLAY_OPACITY = 0.6;
 
// ...
 
function initServiceTermsButton()
{
  new Control.Modal('service-terms', {width:   480,
                                      height:  640,
                                      opacity: MODAL_OVERLAY_OPACITY});
}

IE doesn't seem to like this code. I get errors indicating that some functions are undefined even though they are. If I remove the constant declaration and replace MODAL_OVERLAY_OPACITY in initServiceTermsButton() with the actual value, IE doesn't complain. I don't have this problem with Firefox.

Any ideas what I may be doing wrong, or is this yet another IE bug?

[paul_wilkins]

IE provides only JavaScript 1.3 support.
The CONST statement is a feature from JavaScript 1.5

[ReeD]

All right, thanks for informing me.

[paul_wilkins]

That's alright.

Mozilla keeps a good reference to javascript. The one about the const statement is at:
http://developer.mozilla.org/en/docs...atements:const

And a simple test is all it takes to discover what version of javascript a certain browser supports.
http://forums.microsoft.com/MSDN/Sho...PostID=2870479