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| Feature | WMLScript | JavaScript |
| Semicolons | Mandatory | Optional |
| Supports HTML Comments | No | Yes |
| Non-escape characters preceded by a backslash | No | Yes |
Names may include $ characters | No | Yes |
| Supports global variables | Yes | Yes |
| Supports automatic declarations | Yes | Yes |
Supports the generic term number | Yes | No |
| Specifies maximum and minimum values for integers | Yes | No |
| Supports double-precision floating-point values | No | Yes |
| Supports objects | No | Yes |
| Supports arrays | No | Yes |
typeof returns | an integer | a string |
Supports for..in | No | Yes |
Supports with | No | Yes |
| Supports Libraries | Yes | No |
Supports invalid | Yes | No |
Supports isvalid | Yes | No |
Supports delete | No | yes |
Supports void | No | Yes |
Supports div | Yes | No |
Supports extern | Yes | No |
Supports pragmas | Yes | No |
For more on WMLScript, go to Column 62, WMLScript Primer.
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