html模板中的数字保留两位小数

<script> //html模板中的数字保留两位小数 function formatCurrency(num) { num = num.toString().replace(/\$|\,/g,''); if(isNaN(num)) num = "0"; sign = (num == (num = Math.abs(num))); num = Math.floor(num*100+0.50000000001); cents = num%100; num = Math.floor(num/100).toString(); if(cents<10) cents = "0" + cents; for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++) num = num.substring(0,num.length-(4*i+3))+','+ num.substring(num.length-(4*i+3)); return (((sign)?'':'-') + num + '.' + cents); }</script>