JavaScript正則表達(dá)式校驗(yàn)非零的正整數(shù)實(shí)例

2020-01-20 22:04:23

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話不多說(shuō)，請(qǐng)看實(shí)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(cè)可用      //var regu = /^/+?[1-9][0-9]*$/; 親測(cè)可用      if (val != "") {        if (!regu.test(val)) {          document.getElementById("labResult").style.color = "red";          document.getElementById("labResult").innerHTML = "驗(yàn)證失敗！";        } else {          document.getElementById("labResult").style.color = "green";          document.getElementById("labResult").innerHTML = "驗(yàn)證成功！";        }      }    }  </script></head><body>  <input id="txtNumber" name="txtNumber" type="text" />  <input id="btnValidation" name="btnValidation" type="button" value="校驗(yàn)" onclick="validation()" />  驗(yàn)證結(jié)果：<label id="labResult" ></label></body></html>