windows - How to download multiple images from a web server?

I would like to download *.jpg images from a web server. The web page (and web server) is secured so that I have to give my credentials to access it. There is no one web page which has links to the images, but I can use direct URL:s to access those images. The *.jpg images are named using numbers, e.g.

http://www.[somewebpage].com/1.jpg
http://www.[somewebpage].com/2.jpg
http://www.[somewebpage].com/3.jpg
...and so on

There are hundreds of images, how can I download them at once? I was thinking of using wget or similar, but how can I give my credentials in wget (for the secured web page)? Or can I use some kind of download manager (downthemall in Firefox or some alternative)?