How to check if a variable is defined - JavaScript
The correct way to check if a JavaScript variable is defined is to check its type and compare it to the 'undefined' string (NOT as keyword).
var isDefined = (typeof(myVar) !== 'undefined');
- PostgreSQL with PHP and ODBC
- Simulating Regiser Globals (PHP)
- Multiple images in a single PHP file
- PHP, MySQL and UTF-8
- Multithread Swing programming [Java]
- Web application development questions and answers
- PostgreSQL Select tables' names
- PostgreSQL get junk table names
- How to force PHP to display all the error messages
- How to get file extension [PHP]
- How to format filesize [PHP]
- CHMOD wrapping class [PHP]
- How to make IE and FF to run out of memory [JavaScript]
- SVN Externals
- PHP How to get file's real location
- CodeIgniter Polish transtation
- Java Sorting Algorithms
- WSU Khepera Simulator
- Postgres - How to check if plpgsql is installed
- Macromedia Flash MX - Drawing methods
- 3d in Macromedia Flash MX
- Bot Scout library for CodeIgniter
- How to check if a variable is defined - JavaScript
- Uninstalling Netbeans 7.0 undex Ubuntu 11.04
