How to test if image url is valid url using Jasmine?

I have just started reading jasmine testing framework. I have gone through

http://ift.tt/29Zb9vY

http://ift.tt/1sCwRxB

http://ift.tt/2bdS3E6

Now suppose I have an image URL on UI side that is created dynamically then how can I test that the URL is valid URL of an image? UI testing can be done using jasmine ?