php - Coupon displayed after user uses Addthis -

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i see addthis has sample code may help: http://www.addthis.com/help/client-api#events

in registration form, want display coupon code in input text field if share site. ideas on how this?

in html, give input field id can reference later:

<input type="text" id="coupon-code" value="">

then, here's addthis listener:

<script type="text/javascript">     addthis.addeventlistener('addthis.menu.share', function(evt) {         // show coupon code         document.getelementbyid('coupon-code').value = "code12345";     }); </script>

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