正则的使用例子

来源：互联网发布：音乐频谱分析软件编辑：程序博客网时间：2024/04/30 04:00

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
用户密码：<input type="text" onblur="a1()" id="a1"><span id="a5"></span><font style="color:red">*</font></br></br>
身份证号：<input type="text" onblur="a2()" id="a2"><span id="a6"><font style="color:red">*</font></span></br></br>
email：<input type="text" onblur="a3()" id="a3"><span id="a7"><font style="color:red">*</font></span></br></br>
手机号码：<input type="text" onblur="a4()" id="a4"><span id="a8"><font style="color:red">*</font></span></br></br>
<input type="button" value="注册">
</body>
<script type="text/javascript">
function a1(){
    var str = document.getElementById("a1").value;
   var reg=/^[a-z A-Z]{1}\w{5,17}$/;
   if(reg.exec(str)!= null)
   {
   document.getElementById("a5").innerHTML = "对对对对对";
   }
   else document.getElementById("a5").innerHTML = "错错错错错";
}
function a2(){
   var str = document.getElementById("a2").value;
   var reg=/^1[0-9]{17}/;
   if(reg.exec(str)!=null){
      document.getElementById("a6").innerHTML = "对对对对对";
   }
   else document.getElementById("a6").innerHTML = "错错错错错";
}
function a3(){
   var str = document.getElementById("a3").value;
   var reg=/^\www\.\w{1,8}\@\w{2}\.\w{3}/;
   if(reg.exec(str)!=null){
       document.getElementById("a7").innerHTML = "对对对对对";
   }
   else document.getElementById("a7").innerHTML = "错错错错错";
}
function a4(){
   var str = document.getElementById("a4").value;
   var reg=/^1[0-9]{10}/;
   if(reg.exec(str)!=null){
       document.getElementById("a8").innerHTML = "对对对对对";
   }
   else document.getElementById("a8").innerHTML = "错错错错错";
}
</script>
</html>