rem: onTopLevel: function(context, frame) 
add: onTopLevel: function(context, frame, url) 
context:     onTopLevel: function(context, frame)    {    }
meta: 7450	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7450/a3d0767bc6a4b4299591e2998a8b962b08b011ac/debugger.js/buggy/extension/content/firebug/debugger.js