Richfaces & Firebug

[gregoryl]

Could someone explain to me why is Firefox Firebug showing this kind of error:

fvd is not defined
resetMedia()( Document [pageName].faces, "link" ) skinning.js.faces (line 3)
f()()skinning.js.faces (line 4)
[Break on this error] name+"\"]");}catch(ex){try{elements=elt.getElementsByTagName(name);}catch(nf){}}

[ilya_shaikovsky]

need more info about the environment and page sources.