For more sophisticated documents, you should edit the code in an external editor and use the Browse button to upload the contents of your file.
For example, a more complex HTML page that requires script to render the contents of the page will begin like the following sample:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html >
<head>
<title></title>
<script src="Script/Script.js" type="text/javascript"></script>
<link href="CSS/Styles.css" rel="stylesheet" type="text/css" />
</head>
<body onload="SDK.ImportWebResources.showData()">
<div id="results" />
</body>
</html>
After the document is opened in the text editor and saved, the HTML will be changed to this:
<HTML><HEAD><TITLE></TITLE>
<META charset=utf-8></HEAD>
<BODY contentEditable=true onload=SDK.ImportWebResources.showData()>
<SCRIPT type=text/javascript src="Script/Script.js"></SCRIPT>
<LINK rel=stylesheet type=text/css href="CSS/Styles.css">
<DIV id=results></DIV></BODY></HTML>