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You are interested in using "cookies" and "user authentication". Both of these are rich and complex topics. I suggest you use those as keywords to [Super Search] here on PM, or on google, and also check out some of [merlyn]'s writings, such as <a href="http://www.stonehenge.com/merlyn/WebTechniques/col61.html" >Basic Cookie Management</a>
to help you get some background information and techniques. <p>There are quick answers to your questions, but getting a good grip on the big picture is priceless. <p>--bibo
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