Try the below Inline visualforce page code,
<apex:page standardController="Quote">
<apex:stylesheet value="{!URLFOR($Resource.sflight, 'assets/styles/salesforce-lightning-design-system.css')}"/>
<apex:stylesheet value="{!URLFOR($Resource.sflight, 'assets/styles/salesforce-lightning-design-system.min.css')}"/>
<!-- jQuery CDN -->
<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
<!-- Declare SessionId Variable For AJAX Toolkit -->
<script type="text/javascript">
var __sfdcSessionId = '{!GETSESSIONID()}';
</script>
<!-- Salesforce AJAX Toolkit Source -->
<script src="../../soap/ajax/36.0/connection.js" type="text/javascript"></script>
<button class="slds-button slds-button--brand" style="margin-left: 45%; margin-top: -1%;" onclick="MyFunction();">
Create Pdf
</button></apex:page>
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