add: return null; 
context: function mng_getrule(name){    for (var p in this.entries)    {        if (isinstance(this.entries[p], Object))        {            if (name in this.entries[p])                return this.entries[p][name];        }    }}
meta: 1622	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1622/476e7af60de649791bc59aa6ebf9554fd67536f0/munger.js/clean/xul/lib/munger.js