1、匹配非负整数（正整数 0）
<div class="qfverify"><input type="text" onkeyup="inputIntReg(this)" placeholder="请输入充值预算"><p class="qfverify__font">请输入有效数字</p>
</div>
<script>function inputIntReg(obj) {var val = obj.value;var reg = /^(0|([1-9]\d*))$/;if(val.length > 0){if (reg.test(val)){$(obj).closest('.qfverify').removeClass('is-error')} else {$(obj).closest('.qfverify').addClass('is-error')}}else{$(obj).closest('.qfverify').removeClass('is-error')}}
</script>
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