[Javascript] "var" keyword

[javascript@xxxxxxxxxx (Peter-Paul Koch)]

>I can declare my variables with the "var" keyord, or not. I can delete a 
>variable with "delete" keyword or not. But what is the real diference and 
>how should I do?

If you declare a variable inside a function by using the 'var' keyword, it 
becomes a local variable:

var theVar = 'global';

function doSomething()
{
  alert (theVar) // gives 'global'
  var theVar = 'local';
  alert (theVar) // gives 'local'
}

As to delete, I never use it and I seem to remember Flanagan said it's not 
very important in JavaScript.

ppk

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