js 生成sn

function sn() {var date = new Date();var year = date.getFullYear();var month = date.getMonth()+1;var day = date.getDate();var hour = date.getHours();var minute = date.getMinutes();var second = date.getSeconds();//var milliseconds = date.getMilliseconds();var rand = Math.round(Math.random()*100);  return year+""+month+""+day+""+hour+""+minute+""+second+""+rand;}