关于在text中判断输入的E-mail地址是否正确

Question

不报错才奇怪呢
你传入的参数是什么东西
应该在函数里得到text对象，然后check

Answer 1

<SCRIPT LANGUAGE="JavaScript">
<!--
function checkEmail() {
var pattern=/\w+@\w+\.\w{1,3}/g;
if (!pattern.test(EMAIL.value)) 
{
alert('电子信箱地址输入有误!!'); 
EMAIL.focus();
return false;
}
}
//-->
</SCRIPT>
<INPUT TYPE="text" NAME="EMAIL">
<INPUT TYPE="button" value="检查Email" onclick="checkEmail()">

Answer 2

帮你改了一下错误，不过你这个算法还有问题
<SCRIPT LANGUAGE="JavaScript">
<!--
 function chkemail(w_email)
 { 
 var i=w_email.length;
    var temp = w_email.indexOf('@');
    var tempd = w_email.indexOf('.');
    if (temp > 1) {
if ((i-temp) > 3){
  if ((i-tempd)>0){
   return true;
 }
}
}
   alert("输入的地址不正确！")
return false;
}
//-->
</SCRIPT> <form  name=srh  method="POST" action="WordsMando.jsp?flag=1" onsubmit="return chkemail(this.elements('w_email').value)" >
  <tr>
   <td>E-Mail<input type="text" name="w_email" size="20"> </input><INPUT TYPE="submit"></td> 
    </tr>

Answer 3

注意这里onsubmit="return chkemail(this.elements('w_email').value)"

Answer 4

<%@ page contentType="text/html; charset=gb2312" language="java"  import="java.sql.*,lightningboard.bean.*" errorPage="" %><jsp:useBean id="wordsBean" scope="page" class="lightningboard.add.WordsBean"/><%@include file="inc/headerluck.jsp" %>    
<script LANGUAGE="JavaScript"> <!--
function chkemail(w_email) {
{ var i=w_email.length;
 var temp = w_email.indexOf('@');
 var tempd =w_email.indexOf('.');
 if (temp > 1) {
  if ((i-temp) > 3){
   
    if ((i-tempd)>0){
     return 1;
    }
   
  }
 }
 alert("电子信箱地址输入有误!!");
 return false;
}//--> </script>     
<tr>
 <td>       
      <table border="0">     
         <tr>
           <td><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;您好!欢迎留言!</font></a></td>
        </tr>              
        </table>
    <table align="center">           
    <form  name=srh  method="POST" action="WordsMando.jsp?flag=1" onsubmit="return chkemail(this.elements('w_email').value)">
   
     
        <tr>
       <td>&nbsp;&nbsp;<input type="hidden" name="id" size="20" value=<%=n%>></input> </td>           
         </tr>             
        <tr>
       <td>姓&nbsp;&nbsp;名<input type="text" name="w_name" size="20"></input> </td>           
         </tr>   
         <tr>
         <td>E-Mail<input type="text" name="w_email" size="20"> </input></td> 
        </tr>   
      <tr>    
        <td>留&nbsp;&nbsp;言<textarea rows="10" name="w_content" cols="80"></textarea></td>
       </tr>
         <tr>
         <td align="center" colspan="2"><input type="submit" value="【提交】" name="B1"><input type="reset" value="【重置】" name="B2">                      
       </td> 
                              
         </tr>  
          </form> 
<%@include file="inc/footerluck.jsp" %>  我已经贴出来了，请高手帮帮忙！谢谢！

Answer 5

<%@ page contentType="text/html; charset=gb2312" language="java"  import="java.sql.*,lightningboard.bean.*" errorPage="" %><jsp:useBean id="wordsBean" scope="page" class="lightningboard.add.WordsBean"/><%@include file="inc/headerluck.jsp" %>    
<SCRIPT LANGUAGE="JavaScript">
<!--
 function chkemail(w_email)
 { 
 var i=w_email.length;
    var temp = w_email.indexOf('@');
    var tempd = w_email.indexOf('.');
    if (temp > 1) {
if ((i-temp) > 3){
  if ((i-tempd)>0){
   return true;
 }
}
}
   alert("输入的地址不正确！")
return false;
}
//-->
</SCRIPT>     
<tr>
 <td>       
      <table border="0">     
         <tr>
           <td><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;您好!欢迎留言!</font></a></td>
        </tr>              
        </table>
    <table align="center">           
    <form  name=srh  method="POST" action="WordsMando.jsp?flag=1" onsubmit="return chkemail(this.elements('w_email').value)">
   
     
        <tr>
       <td>&nbsp;&nbsp;<input type="hidden" name="id" size="20" value=<%=n%>></input> </td>           
         </tr>             
        <tr>
       <td>姓&nbsp;&nbsp;名<input type="text" name="w_name" size="20"></input> </td>           
         </tr>   
         <tr>
         <td>E-Mail<input type="text" name="w_email" size="20"> </input></td> 
        </tr>   
      <tr>    
        <td>留&nbsp;&nbsp;言<textarea rows="10" name="w_content" cols="80"></textarea></td>
       </tr>
         <tr>
         <td align="center" colspan="2"><input type="submit" value="【提交】" name="B1"><input type="reset" value="【重置】" name="B2">                      
       </td> 
                              
         </tr>  
          </form> 
<%@include file="inc/footerluck.jsp" %>