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how to check duplicate login  RSS feed

shashiD kanth
Posts: 6
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I have two questions here.

1. I have a situation where if one user is logged in, and again with same user name other user is logged in at other place he should not be allowed.

2. I want show errors in red color, warning in orange, and other information in green at the top on the page in struts, How to acheive this?
Deepak Bala
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