Emap Advertising has signed up with Media Trader and iMediapoint to sell cross-media sales packages online.
As part of the arrangement, Media Trader is setting up a cross-media section within its trading service to accommodate Emap's requirements.
This will promote cross-media buying opportunities but will not initially offer online trading.
Emap Advertising's head of new product development Nigel Gwilliam said single brand opportunities would also be offered but that the focus would be on cross-media deals.
'It is an opportunity to reach commercial partners who may not be fully aware of all our brands and the creative multi-media opportunities we can offer,' said Gwilliam.
He added: 'The Smash Hits brand can offer promotional opportunities across print, TV and events, and Kiss FM is the most popular youth brand in London.'
The first sponsorships to be offered online will be Kiss 100's Bam Bam Breakfast Show and a variety of FHM opportunities.
Gwilliam said he intended to use the online facility primarily to showcase opportunities that would spark initial interest. At that point, traditional face-to-face negotiations would take over.
'In practice, I don't believe any online trading takes place, but our partners do have plans to extend their offerings,' said Gwilliam.
The online sales approach will work in parallel with Emap's market development team, which also offers cross-media opportunities.