php - Using JavasScript Onclick function to toggle visibility twice -

my code:

<div> <a href="/forms/login-form.php" onclick="toggle_visibility('login-div'); return false;">login</a>     <div id="login-div">         <?php include($_server['document_root'].'/forms/login-form.php');?>              </div> <a href="/forms/signup-form.php" onclick="toggle_visibility('signup-div'); return false;">sign up</a>     <div id="signup-div">         <?php include($_server['document_root'].'/forms/signup-form.php');?>                 </div>         <script type="text/javascript">             <!--                 function toggle_visibility(id) {                         var e = document.getelementbyid(id);                        if(e.style.display == 'block')                           e.style.display = 'none';                        else                           e.style.display = 'block';                 }             //-->         </script>        </div> 

problem: login link works javascript onclick function , signup link nothing. although, when removed login link , div, signup works. therefore can mean there problem way using javascript function.

apparently cant use same javascrit function twice. tried adding function same functionality different name ie(toggle_visibility2) still first login link working toggle.

if true, how accomplish getting both links toggle js

the problem included display none in forms div:

<div id="hasjavascript" style="display: none"> form code.... </div> 

the fix:

 <div id="hasjavascript">     form code....     </div>