Example
<button id="googleFormButton" class="mdl-button mdl-js-button mdl-button--raised">
Load Form
</button>
<dialog id="googleFormsDialog" class="mdl-dialog">
<!-- <h4 class="mdl-dialog__title">Google Form</h4> -->
<div id="googleformparent" class="mdl-dialog__content">
<div id="googleFormsDialogIFrameLoading">Loading...</div>
<!-- IFrame element googleFormsDialogIFrame is added dynamically due to google forms popup issue. -->
</div>
<div class="mdl-dialog__actions">
<button id="dialogclose" type="button" class="mdl-button">Close</button>
</div>
</dialog>