Tip Bank

DevX - Software Development Resource

Form with One Text Field

Question: I see search pages that allow text input, then pressing the ENTER key is the same as pressing a link or pushbutton. How is this done? Answer: If a

DevX - Software Development Resource

Blocking E-mail from Specific Address

Question: How do I block an e-mail address from sending messages to our server? A former employee keeps sending messages from his outside account to our current employees. I have

DevX - Software Development Resource

Placing Child Window

Question: How do I make a child window go behind its parent window when a button is clicked? I know self.focus() brings a window forward. I need the opposite of

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Disabling Right Clicker on Mouse

Question: Is it possible to disable the user’s right click button using JavaScript? Answer: Is it possible? Yes. Oh, you wanted to know how to do it… Keep in mind,

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Checking for Value “NaN”

Question: Why does my if statement if (final == “NaN”) { window.alert(“You…are…a…dunce. Hit reload to try again.”);} fail to detect when final is “NaN”? It always goes straight on to

DevX - Software Development Resource

SQL with Unix Arguments

Question: How do I pass arguments from a Unix shell onto SQL for various SQL statements (e.g., select * from $tablename, create table $TABS, etc.)? Also, how do I get

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WAP Security Issue

Question: When encrypted information is being interchanged between a client and a “secure” server through WAP, does the information ever lie decrypted on the WAP gateway or does the client

DevX - Software Development Resource

Inheritance in C++

Question: In order to have better maintainability and optimum performance, how many levels of inheritance do you recommend ? Answer: Performance is not affected by the depth of inheritance. The

DevX - Software Development Resource

Date Conversion from Seconds to Normal

Question: Is there some way to write a function that converts a date that is in seconds since December 31, 1969, into a normal date format? Like this: date from