js正则表达式校验非负整数：^\d+$ 或 ^[1-9]\d*|0$

时间：2023-03-08 23:10:58
js正则表达式校验非负整数：^\d+$ 或 ^[1-9]\d*|0$ 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title></title>

    <script type="text/javascript">

        function validation() {

            var val = document.getElementById("txtNumber").value;

            var regu = /^\d+$/;

            //var regu = /^[1-9]\d*|0$/;  亲测可用

            if (val != "") {

                if (!regu.test(val)) {

                    document.getElementById("labResult").style.color = "red";

                    document.getElementById("labResult").innerHTML = "验证失败！";

                } else {

                    document.getElementById("labResult").style.color = "green";

                    document.getElementById("labResult").innerHTML = "验证成功！";

                }

            }

        }

    </script>

</head>

<body>

    <input id="txtNumber" name="txtNumber" type="text" />

    <input id="btnValidation" name="btnValidation" type="button" value="校验" onclick="validation()" />

    验证结果：<label id="labResult" ></label>

</body>

</html>

　　

相关文章