How to access a JavaScript variable from code behind in asp.net

You will need to store the count variable on a server-side control in order to do this.

Example:

<script type="text/javascript">
    var count = 0;

    jQuery('td').click(function () {
        if ($(this).hasClass('process')) {
           count = count + 100;
           alert(count);
           // Store the value in the control
           $('#<%= example.ClientID %>').val(count);
        }
     });
</script>

<asp:HiddenField ID="example" runat="server" />

Then, in your code-behind simply use:

int value;
if (Int32.TryParse(example.Value, out value))
{
     // Do something with your value here
}