rem: return Math.round(num * Math.pow (10, prec)) / Math.pow (10, prec); 
add: return Math.round(num * Math.pow (10, prec)) / Math.pow (10, prec); 
context: function roundTo (num, prec){    return Math.round(num * Math.pow (10, prec)) / Math.pow (10, prec);   }
meta: 1567	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1567/c6101b49aef97cf47069c333c0e54bcdd4a66616/utils.js/clean/js/lib/utils.js