JavaScript验证

Question

这段代码有什么问题？

网页正在导入这个外部JavaScript，但是在用户输入错误时，不会显示警告消息框。

page.jsp：

<form name="reg-form" action="ServletName" 
onsubmit="return validateForm()" method="POST"> 
<table> 
    <tr> 
    <td> 
     <input name="organization" type="text" required> 
    </td> 
    </tr> 
    <tr> 
      <td> 
      <input type="submit" value="Register"> 
      </td> 
    </tr> 
    </table> 
</form>   

val.js：

function validateForm() 
{ 
var result=true; 
var message=""; 

var orgnization=document.forms["reg-form"]["organization"].value; 
if(orgnization.length<3) 
{ 
    message+="\nName of Organization cannot be less than 3 characters long"; 
    result=false; 
} 
if(!result) 
{ 
    alert(message); 
} 
return result; 
} 

Answer 1

试试这个：

function validateForm() 
{ 
var result=true; 
var message=""; 

var orgnization=document.getElementsByName["organization"][0].value; 
if(orgnization.length<3) 
{ 
    message +="\n Name of Organization cannot be less than 3 characters long"; 
    result=false; 
} 
if(!result) 
{ 
    alert(message); 
} 
    return result; 
}