JavaScript正则表达式校验非零的正整数实例

本文分享了JavaScript正则表达式（^[1-9]\d*$ 或 ^([1-9][0-9]*){1,3}$ 或 ^\+?[1-9][0-9]*$）校验非零的正整数实例代码，代码简单易懂，需要的朋友可以看下

话不多说，请看实例代码

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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 = /^[1-9]d*$/;

									      //var regu = /^([1-9][0-9]*){1,3}$/; 亲测可用

									      //var regu = /^+?[1-9][0-9]*$/; 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>