J.I.T. debugger script error on pop-up

Does anyone else have this?
In IE7 whenever by clicking on an image (or other element?) a new window is
opened to display some info, a Just in Time Debugger window opens reporting
a script error. It appears 3 times before finally the intended window is
displayed.
If I actually allow the JIT Debugger to open my development environment, the
error occurs in the following line of JavaScript:

if (top_level_dom.Document.location.host.match(whitelist[w_cnt]))

and the error message says "Permission Denied". The full JavaScript routine
is:

// returns true iff the top level document and all frames have a dss
category < 2
function site_dss_ok() {
whitelist = new Array(/^stores\.yahoo\.com$/, /store\.vip\.yahoo\.com$/,
/^stores\.ebay\.com$/, /^store.yahoo.com$/);
for (var w_cnt = 0; w_cnt < whitelist.length; w_cnt++) {
if
(top_level_dom.Document.location.host.match(whitelist[w_cnt])) {
return true;
}
}

var ok = true;
if (top_dss_category > 2 || top_dss_popularity == "VERY_UNPOPULAR" ||
top_dss_popularity == "UNKNOWN")
ok = false;
for (var dom_cnt = 0; dom_cnt < frame_dss_categories.length; dom_cnt++)
if ((frame_dss_categories[dom_cnt] > 2 ||
frame_dss_popularities[dom_cnt] == "VERY_UNPOPULAR" ||
frame_dss_popularities[dom_cnt] == "UNKNOWN") &&
has_forms(frame_doms[dom_cnt]))
ok = false;
return ok;
}

This is the script whatever web document is concerned, so I presume it's
some kind of IE behind-the-scenes script that is always run.

 

Hi Peter,
Not realy sure but from memory, I think the release notes mention that
window.helper objects are not supported in V7, so you can't call the
top-level document from your popup.
Any other toolbars installed?
Guess - anti-phishing filter turned on?
Do you have the debugger turned on on the Advanced tab of Internet Options?
Regards.