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

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

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

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