Answer (2):

DunbarPappy®ϟϟ

Looks a bit like a cookie issue; session cookies to be more specific.
For Firefox, configure this first:
Tools> Options> Privacy: top drop menu set to "Firefox will use custom settings..."> Check 'Accept Cookies from sites'
& **Un-Check 'Accept 3rd Party cookies'**
From drop menu, "Keep until (they expire)"
This small utility will assist managing (allow/disallow) cookies on a "site-by-site" basis:
Cookie Button 0.9.3: https://addons.mozilla.org/en-US/firefox...

Internet Explorer users, do this first:
Tools> Internet options> Security> tick the "Internet" icon> Security level box> set slider to "Medium high"> OK out. Then:

IE (pre-8): Go to the site first> Tools> Internet options> Security> tick the 'Trusted' icon> Sites> Add> ok> out
Note this setting may permit undesirable 'Active scripting' or other server based action: use with caution, especially if you have 'Active content' allowed.
Again, supplemental blockers, in browsers mainly, may have to be muted, or 'site allowed'.

Stop undesirable advertising:
INTERNET EXPLORER: Tools> Internet Options> Privacy> Advanced:
here check 'Override automatic....'; 'Allow session cookies'; 'Allow 1st party cookies' & **'Block 3rd Party Cookies'**.

IE 8:
Go to the site needing approval & copy the URL from address bar, then:
Tools> Internet Options> Privacy> Sites> paste that URL into top line> Allow> OK> OK.
The "Pop-up Blocker" may also need to be modified to accommodate the site.
Tools> Internet Options> Pop up blocker heading> Settings> again, paste that URL into the slot> Close> OK.

jani_b_gud

Assuming you are using IE? Try a diffrent browser such as Firefox. See if that handles your banking site differently.

mozilla.com/firefox/