Validate Style Opacity Values

I am working on debugging a site that I inherited from another developer. One of the issues is that the OpenLayers map was broken in Internet Explorer 8. When loading, the browser would display the following message:

Message: Arg: Fraction out of range (0 to 1 allowed)
Line: 2597
Char: 1
Code: 0
URI: http://openlayers.org/api/2.11/OpenLayers.js

After a while, I discovered that someone had set the fillOpacity in the style properties of a style to 2, despite the fact that the help text clearly states that "This should be a value between 0 and 1."

Perhaps we might add a validate function to ensure that this value is being set properly when the form is being filled out, or check that it is not greater than 1 when creating the map?