## html页面
input标签增加自定义规则data-rule="required;amount"
```
<input id="c-amount" class="form-control" step="0.01" name="row[amount]" type="number" value="0.00" data-rule="required;amount" readonly >
```
js页面
```
$.validator.config({
rules: {
amount: function (element) {
// 获取当前余额
var balance = parseFloat($('#money').html());
// 获取输入的金额
var amount = parseFloat($('#c-amount').val());
// 验证金额是否大于当前余额
if (amount <= 0) {
return '结算金额错误！';
}
if (amount > balance) {
return '结算金额不能大于当前余额！';
}
}
}
});
```
