replace func for input type image

replace func for input type image

Hi,

I'm not sure, how to solve this issue. I want to have a hover func for
inputs with the type image. The input itself has the attribute src which
I want to change when someone hovers over the input. So, the old
src="standard_btn" should change to src="standard_btn_hover".
I was trying something with removeAttr but it didn't work. Maybe I have
to use a variable?!

thanks for hints

T.C.