Show / hide button

Hello All! i have problem, in project i have button: SaveDrawing - instance name, i need make in html value for hide or show button, now my html value, looks like:

ImagePath=assets/dynamic/images/folders/example&zXMLPath=annotations.xml&zEditMode=1&zServerIP=http://myhost.com.au&zServerPort=80&zXMLSaveHandlerPath=upload.php

i need add value: buttonVisible = 1 - show button, 0 - hide button, then my values should be looks like:

ImagePath=assets/dynamic/images/folders/example&zXMLPath=ants.xml&buttonVisible=1&zEditMode=1&zServerIP=http://myhost.com.au&zServerPort=80&zXMLSaveHandlerPath=upload.php

let me know how make code in AS3 for manipulation button (hide or show)

Many Thanks