金额输入验证

//金额输入验证
function validateMoney($this) {
    var num = $this.val();
    num = num.replace(/[^\d+(\.\d)?$]/g, '');
    if (isNaN(num)) {
        num = "0";
    }
    if (num.indexOf(".") > 0) {
        var t = num.split(".")[1];
        if (t.length > 2) {
            num = parseFloat(num).toFixed(2);
        }
    } else if (num != "") {

        num = parseFloat(num);
    }
    $this.val(num);
}