How to verify multiple page radio and check

How to verify multiple page radio and check? If JavaScript has never been learned, it means that the authentication username and password cannot be blank. in this case, how to verify multiple radio pages and check? Prompt the user to select at least one item, and then point the cursor to the question where dl is set to id. how should js be written? Baidu hasn't found the proper code for a long time .... beg for advice ....., it doesn't matter if it doesn't matter. you can refer to my blog ht page multi-radio and check how to verify it?

If JavaScript has never been learned, it means that the authentication username and password cannot be blank. in this case, how to verify multiple radio pages and check? Prompt the user to select at least one item, and then point the cursor to the question where dl is set to id. how should js be written?
Baidu hasn't found the proper code for a long time ....
Beg for advice .....




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Don't js doesn't matter, you can refer to my blog http://blog.csdn.net/xuzuning/article/details/5861501
Very simple
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Discussion

Don't js doesn't matter, you can refer to my blog http://blog.csdn.net/xuzuning/article/details/5861501
Very simple

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It can be opened on the first floor.

In addition, JS can be learned early. This is useful.
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Use different places to Judge multiple times
For example.
Choose world famous books
You can use DIV as a module of world famous books
The content can be submitted by AJAX.
It can also be hidden.