Jquery: increase the current form input value with 1
<p>I'm just trying to get a number from a hidden form input and plus 1 to that number and then put that value to the incremented number.</p>

<p>Here is my code</p>

<pre><code>jQuery('#add_slider_image').live('click', function() {

  var slideId = jQuery('#count-level').attr('value');
  jQuery('#count-level').attr('value',slideId+1);

});
</code></pre>

<p>What am I doing wrong? as it changes the value to 11 or even 111 depending on the amount of clicks. It needs to add the value with 1. like 1+1=2 not 11.</p>

<p>Thanks</p>
