Update OpenLayers popup
===

I am trying to update some popups in my map but I am not able to do that.

Firstly I create some markers, and with the next code, I create a popup associated to them. One popup for each marker:

     popFeature = new OpenLayers.Feature(markers, location); 
					         popFeature.closeBox = true;
					         popFeature.popupClass =     OpenLayers.Class(OpenLayers.Popup.FramedCloud, {
				        	    	 'autoSize': true
					         });
					         popFeature.data.popupContentHTML = "hello"; 				         
    popFeature.data.overflow = (false) ? "auto" : "hidden";		
		      				 var markerClick = function (evt) {
                					if (this.popup == null) {
					                    this.popup = this.createPopup(this.closeBox);
					                    map.addPopup(this.popup);
					                    this.popup.show();
					                } else {
					                    this.popup.toggle();
					                }
					                currentPopup = this.popup;
					                OpenLayers.Event.stop(evt);
					         };
					         mark.events.register("mousedown",     popFeature, markerClick);

After that, I add the new marker to my marker layer.

Everything is fine until here, but, I want to update the popupcontentHTML some time later and I don't know how I can access to that value.

I read OL API but I don't understand how to get it. I am lost about features, events, extensions...

I want to know if I can access to that property and write other word.