return (date || Date.now()) - this; 
return (date || new Date()) - this; 
Date.prototype.getElapsed = function (date) {    return (date || Date.now()) - this;};
2975	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2975/d7412703213c269e545a15801e72c938b1614ffe/core-debug.js/clean/src/core-debug.js