A. Simple Link

 <a href="^rooturl^shin/?state=epm;i=^id^"> Add to Cart </a>
          

Example:
Add to Cart

B. Pop-up Link

 <script type="text/javascript">
 function cartAdd(object_id) {
 pointer = window.open('../shin/?state=epm;i='+object_id,'CartWindow',
 'toolbar=no,location=no,status=no,directories=no,linksbar=no,' +
 'scrollbars=yes,resizable=yes,width=800,height=450');
 }
 </script>
          

 <a href="#" onclick="cartAdd('^id^')"> Add to Cart </a>
          

Example:
Add to Cart

If you have more than one link on a single page, you only need to put the script part once