INcreasing score on click of div

HTML

<!-- Increasing score on click of div -->

<div id="circle"> </div>
<div style="position:fixed;top:10px;right:60px;color:red;font-size:40px;">
<table>
<tr>
    <td colspan="2" class="span2rows"><span>Score : 0</span></td>
</tr>
</table>
</div>

CSS

#circle{
   background-color:blue;
    height:50px;
    width:50px;
    border-radius:50px;
}

JavaScript

var score = 0;

$('#circle').click(function(){
		    score=score+10;
    $("span:last").text("Score :" + score);
});