Thanks again AnotherPGriff, you pointed me in the right direction. My working code is:
ColdFusion.Layout.onTabActivate = function(tab){
myTabs = ColdFusion.Layout.getTabLayout("myLayout");
actTab = myTabs.getActiveTab();
if(actTab.id === "myRedirect") {
ColdFusion.navigate("redirectFile.cfm");
}
}
where actTab.id is actually the name attribute of my cflayoutarea
Regards