How to rotate the background image in the container?

Question

I want to rotate the image which is placed in the button of scrollbar in Chrome. Now I have a CSS with this content:

::-webkit-scrollbar-button:vertical:decrement
{
    background-image:url(images/arrowup.png) ;
    -webkit-transform:rotate(120deg);
    -moz-transform:rotate(120deg);
    background-repeat:no-repeat;
    background-position:center;
    background-color:#ECEEEF;
    border-color:#999;
}

I wish to rotate the image without rotating its content.

Answer 1

Very well done and answered here - http://www.sitepoint.com/css3-transform-background-image/

#myelement:before
{
    content: "";
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    z-index: -1;
    background: url(background.png) 0 0 repeat;
    -webkit-transform: rotate(30deg);
    -moz-transform: rotate(30deg);
    -ms-transform: rotate(30deg);
    -o-transform: rotate(30deg);
    transform: rotate(30deg);
}