Extending a image beyond page width

I have a web user control. That control is having an image. Following is the code for image placed in web user control:

<div class="MasterHeaderDivStyle" id="divHeader" style="z-index: 1; left: 0px; width: 100%;
            position: absolute; top: 0px; height: 50px">
            <img style="left: 8px; position: absolute; top: 5px" src="Lowered_Silver.gif"
                name="imgLogo">
        </div>

 Now when i am adding this control on different webpages, one page has large contents and horizontal scroll bar is coming on that page. But this image is not extending beyond full page width. This image is being shown only on part if we ...