How many .medias should be used in CSS3 and what should be the size range? You know I want to target various screen sizes and I have a lot to learn.
I'm not sure I understand your question either.
You usually have two medias in CSS, one for screen and one for print.
Everything else is scaling using percentile and point (instead of pixel values) and stuff like that.
I don't think I understood your question very well, but anyway..
If you are talking about screen sizes, I think using relative positioning, solves the problem.. If you give me more details, maybe I can help you more...
I acutally want to ask that how can i make my website's layout for various screen sizes...is there some way to make different layout for website for different screen sizes without css 3
You can use java script (js), but it's a complicated thing to do..
Also, I think you can use PHP too, but not quite sure, since I haven't started yet learning it...