Test automation and performance tesing

Hi there, I'm in the process of doing test automation and performance testing with loadrunner. I'm struggling to get the object of a listbox selected as it is not visible before selecting it. I also have a problem where by the object name changes after a new page load. ie: mx-referenceselector mx-name-referenceSelector58 will change to mx-referenceselector mx-name-referenceSelector50 . How do I fix this? (getting one standard name for the object. Is there a naming standards doc for naming conversions?)
1 answers

A solution to the changing names can be found in this thread.