Bye ! I must use this script (only for offline use ...I have realize a tutorial and I want use it "fullscreen") : function openfull() { if (document.all ) { w = open("intro.htm","my","fullscreen") } else if (document.layers || (document.getElementById && (navigator.appName="Netscape"))) { netscape.security.PrivilegeManager.enablePrivilege ('UniversalBrowserWrite'); var w = open ('intro.htm','my','width='+(screen.Width)+',height='+(screen.Height)+',title bar=0'); Nobody knows how enable codebase principals in NN6?? In NN 4x it work since I have addeed in my prefs.js file...... user_pref("signed.applets.codebase_principal_support", true); In NN6 I have seen the similar "all.js" file but if set true the line : pref("signed.applets.codebase_principal_support", true); the script don't work !! Thanks in advance Marco