Cracked Screen!

[Gremmers]

Hi,

my gf's Inspiron 1525 has a cracked screen. See below:

http://img251.imageshack.us/i/dscf1661s.jpg/

Is it in danger of getting worse if she keeps using it?
If you tap the sides the liquid wobbles.

Also, if anyone has experience of getting a cheap replacement panel, any advice would be great!

Thanks,
gremmers