Make JS change to website to allow iFrame feed to change

General information for the website: Website has search and iFrame feed of properties
Kind of development: Customization of existing website
Description of every page/module: There is a search form on the homepage and a "Buying" page which embeds an iFrame from a popular Property Listing website.
Description of requirements/features: I had a developer add some JS which allows the user to select an "office" from a dropdown (select) box search form on the homepage. When the user clicks Search, it takes them to the listing page and depending on which office they selected on the dropdown it brings up an embedded iFrame for the appropriate office.

There is a new office, so I need another iFrame URL integrating so if the user selects the new office from the search the listing page will display the new iFrame URL.


In addition on the listing page it says "You are currently viewing properties from X" (X being the name of the office) with a message below saying "View properties from Y" (Y being the name of the other office) which changes the iFrame URL to that of the other office. I will therefore need "or Z" adding to the "View propertes from Y" bit (Z being the new office name).
Extra notes: The website is within Joomla 2.5. There is a file containing JS which the previous developer did and there may be JS within a module/modules that I can point you to.


To summarise, as I said the mechanics are already in there from a previous developer so I just need a small change/changes to get another URL coming through for the new office.