What causes some icons not to appear when I run my iPhone web app in Safari on the desktop?

NOTE: I have rephrased the title be开发者_Go百科cause I'm not getting any answers. Surely someone out there has experienced this problem and knows what to do. Thank you!

I have an iPhone web app that works almost perfectly in Safari on the desktop. Only two things do not work correctly on the desktop:

1. Radio buttons do not appear. They are operational because you can check one if you know where it is; it simply is invisible.

2. When SELECT is used, the little box with the default selection in it and the little down arrow do not appear. However, the actual text of the default selection DOES appear. If I click on that text the drop-down menu appears as it should.

In both cases the problem seems to have to do with icons missing or not rendered as needed.

What is the problem and how can I correct it?

Thank you.

Dave

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Have you tried changing your user agent to Mobile Safari? If you turn on the Develop menu in Safari advanced prefs, you can then test the app in different environments. It's just a thought.