Auto Fill Email Address on Form Field

Here are the steps to auto fill an email field from a form with an email address used to log in via URL:

1. Navigate to Setup> Site Builder> Themes
2. Edit the current theme
3. Click on the Body subtab
4. Look for the Footer field and add the sample code
5. Sample code:
<script type="text/javascript">function submitform(){window.location="https://forms.netsuite.com/app/site/crm/externalleadpage.nl?compid=418126&formid=5&h=86eb04f09e3fc72454f6&redirect_count=1&did_javascript_redirect=T&email="+document.myform.myemail.value;}</script><B>NOTIFY ME!</B><br /><form name="myform" action=""><input type='text' id='myemail' class="newsletter-text" onfocus="if(this.value=='Your Email Address') {this.value ='';}" value="Your Email Address" /><a href="javascript: submitform()">Submit</a></form>