rem: return { toString : function() { alert(1); } }; }); 
add: return { toString : function() { alert(1); } }; }); 
context:   document.watch("title", function() {    return { toString : function() { alert(1); } };  });
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/3703c3c05f398a63e55992f7687ef65273b26d6a/regress-361964.js/clean/js/tests/js1_5/extensions/regress-361964.js