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The JavaScript FAQ
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Adding Your Own Error Handler

Question: Can I set up my own JavaScript error handler?

Answer: Yes. To define your own error handler, use this JavaScript code:

function handlerFunction(description,page,line) {
 // put error-handling operators here
 return true
}
window.onerror=handlerFunction
Your error handler function can optionally use the following parameters:
  • a textual description of the error
  • the address (URL) of the page on which the error occurred
  • the number of the line in which the error occurred

    The error handler function must return false if you wish to invoke the browser's default error handler after your own handler finishes. If you don't want to invoke the browser's default handler, your handler function must return true. For an additional code example, check out our error handling demo!

    JavaScripter.net. Copyright © 1999-2006, Alexei Kourbatov

    The JavaScript FAQ
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