FatalError

It's index.html, not htm.

When I login to YahooMail , I " sometimes" see that warning , not " always " , I want to ask why has that warning and why my data is not encoded ? caused by network 's  problems at those time ?  Thanks!

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Yahoo does that every once in a while if you use the "Remember Me" option. It checks to make sure that you aren't let's say using your friends computer, and he had his password remembered.

What about Coldfusion?

Good question...what about it? If you are going to use PHP, you don't need ColdFusion. Pick one and use it...I recommend PHP.

Ah, I think I see the mistake. In the JavaScript code, where you declared the arrays, you need to add id = [], because otherwise JavaScript doens't understand what "id[p]" is. Also, instead of using p = p+1, just type p++.I recommend re-writing the code, because it's generally not a good idea to have the PHP and HTML mixed up. In other words, try to keep them separate, and instead have funtions to echo the JavaScript.

I would personally prefer PHP over any other language. It's easy to learn, and can be embeded directly into HTML. ASP is [somewhat] good too, but PHP is much better if you are going to use a database, such as MySQL (which in your case is true). Also, ASP is only compatible on IIS, while PHP, being open-source, can be used on almost any server, and many operating systems.