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JavaScript regular expression check non-zero positive integer example

黄舟
Release： 2017-02-20 14:10:24
Original
1407 people have browsed it

Not much to say, please look at the example code

<!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>
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JavaScript regular expression check non-zero positive integer example

JavaScript regular expression check non-zero positive integer example

JavaScript regular expression check non-zero positive integer example

JavaScript regular expression check non-zero positive integer example

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Related labels：
JavaScript，正则表达式，正整数
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