browser - window.onerror does not catch all errors -

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for reason able catch of console errors except "unsafe javascript attempt access frame url". know why error filtered?

my code: 

window.onerror = function(message) { alert(message); return true; };

thanks ahead

possible duplicate:

i not sure if that's way detect same origin policy violations, since window.onerror catches runtime js errors (see here).

for cross browser compatibility of error event can check out:

http://www.quirksmode.org/dom/events/error.html


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