No pictures/buttons showing on either of my 3 sites!

A lot of buttons seem to not be working on all 3 of my sites why is this?
www.mummysworld.net
www.deeplyirresistible.com
www.chatjunkies.net
It has been like that since this morning

Hello,

Have you cleared your cache??

hi its the same with me i just tried to make a picture link/botton and it dosent show the picture. i used <a href="your_url_goes_here"><img src="your_picture.jpg" /></a>
but i dont no whats wrong i tried making a link to runelocus.com