mfLayer.prototype.captureEvent = mfLayerCaptureEvent
function mfLayerCaptureEvent(eventType, toDo) {
  var tempType = eventType
  eval('this.elm.' + eventType + " = " + toDo)
  tempType = tempType.substring(2,tempType.length); tempType = tempType.toUpperCase()
  if (is.ns4) eval('this.elm.captureEvents(Event.' + tempType + ")")
}
mfLayer.prototype.releaseEvent = mfLayerReleaseEvent
function mfLayerReleaseEvent(eventType){
  var tempType = eventType
  eval('this.elm.' + eventType + '=""')
  tempType = tempType.substring(2,tempType.length); tempType = tempType.toUpperCase()
  if (is.ns4) {eval('this.elm.releaseEvents(Event.' + tempType + ")")}
}