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: 1622	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1622/0918cade427e1856c2e2bcfdefa8b4ea3e457b73/utils.js/clean/js/lib/utils.js