JavaScript正则表达式校验非负整数实例

时间:2022-09-22 20:18:46

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>

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原文链接:http://www.cnblogs.com/lengzhan/p/6042730.html