Change the content of the scr attribute of the img tag from a variable retrieved from a local file by the jquery load command

Change the content of the scr attribute of the img tag from a variable retrieved from a local file by the jquery load command

Hello,
I have a big worry for me but small for you:
I want to change the content of the attribute src of the tag img by a variable filter by the command load of jquery. This variable must have the value "node.png" as shown in my work at the attached address:
<Div id = "tutu"> </ div> gives me the screen in the div: node.png. It is this value that I want to put in the attribute src of the tag img.
Address of my work: http://plnkr.co/edit/pKSd7srxCCYGSRZonlQf
Can you help me?

Thanks for your help,

Rodgers