How to pass a parameter to a function that is called on an event?

Simple JavaScript help?

• Write a custom error handling JavaScript function called processErrors that handles a custom error by assigning it to the onerror event handler. Include the block of JavaScript statements needed to pass the arguments sent by the JavaScript interpreter into the processErrors function, send an alert message with the agreements, return, and write the event handler that calls the processErrors function. This is what I came up with so far onerror=processErrors function handleErr() { //Handle the error here return true }

• Answer:

  <script type="text/javascript"> var errordialog=function(msg){ alert(err); return true } window.onerror=function(msg, url, linenumber){ var msg='errordialog'; msg +=' <b style="color:red">JavaScript Error: </b>' + msg +' at line number ' + linenumber; return errordialog(msg) } if you use try catch try { } catch (ex){ errordialog('error at this try catch block' + ex.description); } </script>