javascript - Change the picture into another picture in relation to hover -

goal:
when have cursor on image, should changed image:

problem:
don't know how solve in context.

the source code taken plugin:

a simplified version located in jsfiddle

    $(function(){        $.scrollup({scrolltext: false });     });

i have not changed in javascript source code.

please me this.

user :hover notation:

    #scrollup:hover {        background-image: url("https://cdn0.iconfinder.com/data/icons/sweets/128/lollypop_blue_candy.png");     }

and future: should not hard find yourself. using search engine keyword have in mind + "css" yields pretty solid results.

ITEMscalal