How to increase sprite animation speed

As my question state, I want to manage speed of my sprite animation speed at run time.
I have created Animation Clip and Animator controller.

My inspector look like this :
42488-screenshot-2015-03-13-205323.png

Now I want to change speed of Runner clip at run time mean through script.
Please give some suggestions in this.

You can set animation speed like this.

Animator.speed?

It seems this was a popular issue that’s only recently been made simpler: http://forum.unity3d.com/threads/mecanim-change-animation-speed-of-specific-animation-or-layers.160395/page-2#post-2000306