It is very easy to put together an HTML page with Irfan View. Just select files in the Thumbnail browser, say how many columns of thumbs you want, choose a few other options, and Irfan View does all the work for you in about ten seconds. Then link that page into your website.
Here's my test page done with Irfan View click here
I reckon you will do better with manually coding the page in your web program though. It just depends how many pictures you want. I did this with Net Objects Fusion 4.0 click here