Insert the following code into the head section of your website page
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
<script type="text/javascript" src="https://blockchain.info/Resources/js/pay-now-button.js"></script>


Insert the following html code at the position where you would like the button to appear
<div style="font-size:16px;margin:0 auto;width:300px" class="blockchain-btn" data-address="34iWRrjRt1pGaSetGbyjbHoLZ7RbkKiTsa" data-shared="false">
  <div class="blockchain stage-begin">
      <img src="https://blockchain.info/Resources/buttons/donate_64.png"/>
  </div>
  <div class="blockchain stage-loading" style="text-align:center">
      <img src="https://blockchain.info/Resources/loading-large.gif"/>
  </div>
  <div class="blockchain stage-ready">
      <p align="center">Please Donate To Bitcoin Address: <b>[[address]]</b></p>
      <p align="center" class="qr-code"></p>
  </div>
  <div class="blockchain stage-paid">