Onerror event is one of the many functions developers have to exhaustively use if they are building highly interactive Ajax or JavaScript based application. This form of error handling in JavaScript aids developers in properly handling unexpected errors on events or when an expected form of data has not been received. Aside from instructing the browser on the options available when error happens; onerror could be used by developers to know more about the application. This could be used to detect bugs in the application so that a remedy could be proposed as soon as possible. The basic coding for onerror event goes this way: