JS格式化数字保留两位小数点示例代码

function roundFun(numberRound,roundDigit) //四舍五入，保留位数为roundDigit   {  if (numberRound>=0)  {  var tempNumber = parseInt((numberRound * Math.pow(10,roundDigit)+0.5))/Math.pow(10,roundDigit);  return tempNumber;  }  else   {  numberRound1=-numberRound  var tempNumber = parseInt((numberRound1 * Math.pow(10,roundDigit)+0.5))/Math.pow(10,roundDigit);  return -tempNumber;  } }

<script>  tmp = "1234567.57232"  result = tmp.substr(0,tmp.indexOf(".")+3);  alert(result);  </script>