Why min-width not work?

[Aminalaizer]

I don't know how to use min/max css properties.

can anybody help me?
I think that this code should work. Why doesn't it work?


<span style="position:relative;right:20%;width:100%">Title
<input type="Caption" style="width:80%;min-width:300px;"></span>

The width of the Text needs to be 80% of the navigator, but if you resize the width to number lower than 320%(about) the width will be 300px, and not 80%.

[Android]

Which browser. Some don't support CSS2.