Internet Explorer is probably using the fonts chosen by Answerbank but you can over-ride them as follows:
Go to Tools > Internet Options
On the General tab, click on Accessibility
Place ticks alongside "Ignore font styles specified on webpages" and "Ignore font sizes specified on webpages"
Click OK.
On the General tab (again), now click on Fonts
In the Webpage Font column, choose the font you want to use.
Click OK twice.
With Firefox there's a nice little add-on which lets you easily switch between a font of your choice and that of the website, without having to go into the options each time. My personal choice is Fertigo Pro for all webpages.