// -----------------------------------------------------------------------------------------------------
// JSErrorHandler.js
//
// Error Handling Utilities
//
// Author        : Thomas E. George
// Creation Date : September 23, 2003
//
// History       : 09/23/2003 - TEG - Initial Implementation
// -----------------------------------------------------------------------------------------------------

// A variable we use to ensure that each error window we create is unique.
var error_count = 0;

// Set this variable to your email address.
var email = "webmaster@geonetinc.com";

function supress_errors() { return true; }

// Define the error handler. It generates an HTML form so the user can report the error to the author.
function report_error(msg, url, line)
{
   var w = window.open("",                                       // URL (none specified)
                       "error" + error_count++,                  // Name (force it to be unique)
                       "resizable,status,width=640,height=480"); // Attributes
                       
   // Get the document object of the new window.
   var d = w.document;    

   // Output an HTML document, including a form, into the new window.
   // Note that we omit the optional call to Document.open()
   d.write('<div align="center">');
   d.write('<font size="5" face="helvetica"><b>');
   d.write('Warning... A JavaScript Error Has Occurred!');
   d.write('</b></font><br><hr size="4" width="80%">');
   d.write('<form action="mailto:' + email + '" method=post');
   d.write(' enctype="text/plain">');
   d.write('<font size="3">');
   d.write('<i>Click the "Report Error" button to send a bug report.</i><br>');
   d.write('<input type="submit" value="Report Error">&nbsp;&nbsp;');
   d.write('<input type="button" value="Dismiss" onclick="self.close();">');
   d.write('</div><div align="right">');
   d.write('<br>Your name <i>(optional)</i>: ');
   d.write('<input size="42" name="name" value="">');
   d.write('<br>Error Message: ');
   d.write('<input size="42" name="message" value="' + msg + '">');
   d.write('<br>Document: <input size="42" name="url" value="' + url + '">');
   d.write('<br>Line Number: <input size="42" name="line" value="' + line +'">');
   d.write('<br>Browser Version: ');
   d.write('<input size="42" name="version" value="' + navigator.userAgent +'">');
   d.write('</div></font>');
   d.write('</form>');
   
   // Remember to close the document when we're done.
   d.close();

   // Return true from this error handler, so that JavaScript does not display its own error dialog.
   return true;
}

//// Before the event handler can take effect, we have to register it for a particular window.
//self.onerror = report_error; // or supress_errors

//// The following line of code purposely causes an error as a test.
//alert(no_such_variable);