Hidden JavaScript error

When i navigate across the application, i get a javascript error in my taskbar but gets disapperard immediately before i can identify what is the error about

The error appears in IE and i don't see anythin开发者_JS百科g in FireBug

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Download Firebug for Firefox. Ensure it is enabled, and check out the console. Javascript errors will appear in red, here.

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Hit F12 and find the Script tab. The Console subtab should provide the error info.

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Which application? Which browser are you using? Kindly provide further details

Safari and Chrome come with their built-in developer tools so does IE. As mentioned firefox has Firebug plugin and the venkman debugger