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Override alert() && confirm()

I never tried it before: It's possible to override the javascript built-in functions alert() and confirm(). I think this can be a useful feature in some cases. For instance you can write a function to...

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Load json with ExtJs.Ajax and Ext.util.JSON

An example how to use the ExtJs classes Ext.Ajax and Ext.util.JSON to load json encoded data into a javascript object from a remote source.

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