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JavaScript正則表達式校驗非零的正整數(shù)實例

2020-03-16 20:56:48

字體：大中小

來源：轉載

供稿：網(wǎng)友

話不多說，請看實例代碼

<!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*$/;      //var regu = /^([1-9][0-9]*){1,3}$/; 親測可用      //var regu = /^/+?[1-9][0-9]*$/; 親測可用      if (val != "") {        if (!regu.test(val)) {          document.getElementById("labResult").style.color = "red";          document.getElementById("labResult").innerHTML = "驗證失敗！";        } else {          document.getElementById("labResult").style.color = "green";          document.getElementById("labResult").innerHTML = "驗證成功！";        }      }    }  </script></head><body>  <input id="txtNumber" name="txtNumber" type="text" />  <input id="btnValidation" name="btnValidation" type="button" value="校驗" onclick="validation()" />  驗證結果：<label id="labResult" ></label></body></html>

js,正則表達式,非零正整數(shù)