金额动态输入格式化

 

动态格式化金额为：xxx,xxx,xxx.xx (小数点后最多两位，整数部分三位一组用逗号隔开)

事件触发：onkeyup="formatNum(this)"

var emp = "";

function formatNum(e){

if(e.value==emp) return;

   var ms = e.value.replace(/[^\d\.]/g,"").replace(/(\.\d{2}).+$/,"$1").replace(/^0+([1-9])/,"$1").replace(/^0+$/,"0");

   var txt = ms.split(".");

   while(/\d{4}(,|$)/.test(txt[0]))

    txt[0] = txt[0].replace(/(\d)(\d{3}(,|$))/,"$1,$2");

   e.value = emp = txt[0]+(txt.length>1?"."+txt[1]:"");

}