I'm using an extension "rgtabs" but don't work in FF. Return the error (in FF I have Firebug): setting a property that has only a getter mootools.js (line 2) eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a... In IE works OK. How repair this? Best regards, Patrik