Hidden IP address text on safari iPad

[bratpaq]

When using safari to configure my router, safari would hide any IP address on the web page. I can't even call it hidden, more like a white text on white background, because I can copy it and paste it to see the text.

And when browsing the router config on Dolphin HD, it shows the text. So it's something about safari, anyone know why it's happening? Can I configure it? Or any info site I can see why apple configure safari that way?

Btw, my router is linksys e1200.