Here is the script...
Note that it works in both our http and https environments - in Chrome.
<html>
<head>
<script type="text/javascript">
function getiFrame()
{
document.write('<br><a href="nu#action:npt.overview"><button class="ppm_button">Return to Overview</button></a>');
document.write('<div id="SkillsUpdate"> <div style="height:950px;"> <iframe id="SkillsUpdateIF" src="' + skillpage + '" scrolling="no" frameborder="5" height="100%" width="100%" style="position:absolute; clip:rect(112px,1100px,900px,0px); top:-60px"></iframe> </div>');
}
</script>
</head>
<body>
<script type="text/javascript">
var url = document.URL;
var resid = url.substr(url.indexOf("resid=")+6, 7);
var url1 = "nu#action:projmgr.editResourceReturn&odf_view=resource.custom_skills&id=";
var url2 = "&odf_pk=";
var url3 = "&return_to=custom_close";
var skillpage = url1 + resid + url2 + resid + url3;
getiFrame();
</script>
</body>
</html>