JavaScript正则表达式校验非负整数实例_正则表达式

JavaScript正则表达式校验非负整数实例

2020-08-25 14:33冷战正则表达式

本文分享了JavaScript正则表达式（^\d+$ 或 ^[1-9]\d*|0$）校验非负整数实例代码，代码简单易懂，需要的朋友可以看下

话不多说，请看代码

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									<!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>