JavaScript正则表达式校验非零的负整数实例

2020-01-20 22:04:23

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话不多说，请看实例代码：

<!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*$/;    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>