title: Error-logging for javascript on client side
body: <p>My project which contains a lot of pages with forms. This is a backend of banking CRM system, so any error during working process is to be captured and investigated. 
  On the server side we have enhanced java exceptions system, but if error occurs on client side - javascript the only info we now get is an js-error window in IE or sometimes a screenshot of page made by advanced user.</p>
  
  <p>Javascript code contains both Jquery-powered UI extensions and hard-coded inline event handlers and functions. </p>
  
  <p>So I am asking whether any approach for capturing js-errors of any kind could be used? 
  some additional library or something that could give me a stacktrace like firebug in Mozilla or web-console in Chrome?</p>