screen door transparency

I have to simulate the screen door transparency under OpenGL Es (don’t enable polygon stipple!!)
How I can do it ??
Thank a lot

you use a texture with a alpha map and then use alpha blending.

You mean Alpha Testing, don’t you?

It depends on what you are using it for, alpha blending looks better than alphatesting at a distance, and on top of that the edges can become smoother when your close.