recaptcha not working when in combined with ajax

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Javascript

Java

Ajax

CodeIgniter

Hello all, i hv a problem with my code
i can't show recaptcha in codeigniter when i combined with ajax

the code like this :
script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">
</script>

<script>
$(document).ready(function(){
$("#li1").click(function(){
$("#div1").load("watsup");
$('#divload').hide();
});
$("#li2").click(function(){
$("#div1").load("contact");
$('#divload').hide();
});
});
</script>

<li id="li1" class="active"><a>Home</a></li>
<li id="li2" class="active"><a>Contact Us</a></li>

when i click contact us recaptcha not show,
but when ajax disabled and the html i use like this,

<li id="li1" class="active"><?php echo anchor('watsup', 'Home');?></li>
<li id="li2" class="active"><?php echo anchor('contact', 'Contact us');?></li>

recpatcha worked fine!
i tired to try, anyone can help ?

Thanks,