Javascript 验证Email的格式，使用Regex

Javascript 验证Email的格式，使用Regex
validate email address is below:

1. <script type="text/javascript">
   
2. 
   
3. function RegexEmail(emailInputBox){   
   
4.    var emailStr = document.getElementById(emailInputBox).value;  
   
5.    var emailRegexStr = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
   
6.    var isvalid = emailRegexStr.test(emailStr);
   
7. 
   
8.    if (!isvalid) {
   
9. alert('Invalid email address!');
   
10. emailInputBox.focus;
    
11. }
    
12. }
    
13. 
    
14. </script>
    
15. 
    
16. <input name="emailInput" id="emailInput" maxlength="60" />
    
17. <input id="btn1" type="button" value="Validate Email" onclick="return RegexEmail('emailInput')" />
    

复制代码