jquery - javascript function doesn't execute -

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hi,i have simple login form, fields validated javascript. don't why below code not working.

my html , js code:

<head>         <script type="text/javascript">         function handlelogin() {              var u = $("#username").val();             var p = $("#password").val();              if(u=="a" && p=="a")                 {                  window.location="/site/site.html";                 }             else                 {                 alert("fail");                 }          }         </script>  </head>  <li dojotype="dojox.mobile.listitem">              <input dojotype="dojox.mobile.app.textbox" placeholder="username" type="text" id="username" name="username" />         </li>         <li dojotype="dojox.mobile.listitem">             <input dojotype="dojox.mobile.app.textbox" placeholder="password" type="password" id="password" name="password" />         </li>         <li dojotype="dojox.mobile.listitem">             <input dojotype="dojox.mobile.button" onclick="handlelogin()" type="button" id="submit" name="submit" value="login"/>          </li>

when click on submit button nothings happening.

thanks

you didn't load jquery library. can without it:

var u = document.getelementbyid('username').value, p = document.getelementbyid('password').value;

changing page done location.href instead of window.location:

location.href = '/site/site.html';

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