How To Only Allow Alpha Numeric Chars With JavaScript
<p>Been playing around with JavaScript, and what Im trying to do is only allow certain characters in the pass word field - a-z, A-Z and 0-9.</p>

<pre><code>&lt;form action="http://www.cknuckles.com/cgi/echo.cgi" method="get" name="logOn"&gt;
  User Name:&lt;br /&gt;
  &lt;input type="text" name="userName" size="25" /&gt;&lt;br /&gt;
  Password:&lt;br /&gt;
  &lt;input type="password" name="pw" size="25" /&gt;&lt;br /&gt;
  &lt;input type="submit" value="Log In" onClick="validate()"/&gt; 
&lt;/form&gt;
</code></pre>

<p>Above is my HTML, and Below is my JavaScript I tried to use to validate it - but it doesnt work - any clues.</p>

<pre><code>&lt;script language="javascript"&gt;
   document.logOn.onsubmit=validate;

   function validate(){

var name=document.logOn.pw.value;
    if(!name = "[a-zA-Z0-9]"){              
alert("Your Password Cant Have Any Funky Things In It - Play It Straight!");
    return false;
}               

    return true;
}
&lt;/script&gt;
</code></pre>

<p>But This isnt working. I can still put chars in like "*" and "[" and "{" etc.</p>

<p>Any Thoughts?</p>
