Overriding Built in Functions in JavaScript

Overriding Built in Functions in JavaScript
We can override the built functions (eg: window.open, window.close etc) with our own functions.

<script language = 'javascript'>
function MyownOpen()
{
var args = MyownOpen.arguments;
if (args.length)
alert(args[0]);
}

window.open = MyownOpen;

</script>

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