JavaScript not running in Internet Explorer

Got a phone call this morning from someone who was having problems logging into one of their supplier parts catalogues.

They would enter their logon and details and would just get a blank page

I added the site to the trusted zone and compared the IE settings with a PC that could logon ok (also proving it wasn’t the firewall blocking content or the website itself)

Convinced it was IE to blame i downloaded Firefox Portable and the page displayed correctly

After that we tried upgrading to IE8 (thinking maybe IE was damaged) but still no luck

I then back to the beginning and did a “view source” on the blank page

There was a small piece of JavaScript that basically redirected to the main parts catalogue after login

Just to confirm this I opened my blog – there is some elements on this page that make use of javascript (bottom left hand corner – the “start” menu) and they didn’t work either

I was going to re-install the scripting engine(available here) but I also found

Register Windows Script Engine Fix it Live! – Microsoft Fix It Blog

The “fix it” automatically checks and re-registers the script components

Since i knew it was specifically javascript with the problem i did it manually

regsvr32 C:\WINDOWS\system32\jscript.dll

After I restarted IE the parts catalogue opened as expected as did the flashy bits on my blog