var _ERROR = 0;
var _ERROR_SHOW = false;

window.onerror = function(m,u,n)
{
  if( _ERROR_SHOW ) {
    _ERROR_SHOW = confirm( "Error #" + ++_ERROR + ":\n\n " + m + " \n\nline " + n + " of " + u + "" );
  }
  return true;
}