[OpenLayers-Users] How to access mouse modifier during "featureselected"

[Marcel Ruff]

Hi,

i assume it is trivial, but i couldn't figure it out.

When a user clicks on my markers I would like to see if it was a "Right 
mouse click" or a "Shift Left mouse click" etc.

How can I do this? Here is my code snippet:

....
this.markersLayer.events.register("featureselected", this.markersLayer, 
this.__onMarkerSelect);

...

this.__onMarkerSelect = function(evt) {
  if (evt.isShiftPressed()) { // How???
  }
   

Thank you
Marcel