javascript custom error handler – onerror

Do you need a meaningful error report?

//
onerror = handleErr;
var errorText = "";
function handleErr(msg, url, l) {
   errorText = "There was an error on this page.\n\n";
   errorText += "Error: " + msg + "\n";
   errorText += "URL: " + url + "\n";
   errorText += "Line: " + l + "\n\n";
   errorText += "Click OK to continue.\n\n";
   alert(errorText);
   return true;
}
//

While testing in IE, it will give you more hints.

update (on 19th December 2013): Now a days IEs shipping with powerful debuggers.