View source

{{Tree|{{PAGENAME}}}}

== The Code ==
 window.onerror = function errorHandler(sError, sFile, sLineno) {
 	// If the last node is a script tag with a src attribute, it is likely
 	// to be the cause of the error, so display the src attribute's value:
 	var oLastNode = document;
 	while(oLastNode.childNodes.length > 0) {
 		oLastNode = oLastNode.childNodes[oLastNode.childNodes.length - 1];
 	}
 	var sLastScript = oLastNode.tagName == "SCRIPT" && typeof(oLastNode.src) !== "undefined"?
 		"(Last script: " + oLastNode.src + ")\r\n" : "";
 	if (confirm(
 		"JavaScript Error caught\r\n" +
 		"Error: " + visualize(sError) + "\r\n" +
 		"In line " + visualize(sLineno) + " of file " + visualize(sFile) + "\r\n" +
 		sLastScript +
 		"\r\n" +
 		"(Press OK to ignore or CANCEL for more information)\r\n" +
 		stackDump(1)
 	) && confirm(
 		"JavaScript Error caught\r\n" +
 		"Error: " + visualize(sError) + "\r\n" +
 		"In line " + visualize(sLineno) + " of file " + visualize(sFile) + "\r\n" +
 		sLastScript +
 		"\r\n" +
 		"(Press OK to see ignore or CANCEL to terminate the script)\r\n" +
 		stackDump(1, true)
 	)) {
 		return true;
 	};
 	return false;
 }