使用阴影设计jQuery-ui对话框

I need to style a jQuery-ui-dialog with shadows. I have a sample in which the dialog/popup is styled with nested divs. A picture for each corner and a line for each side which provides the variability in heigth and width. My first solution was to give the header an image and the content a long one, which is cut depending on how much content is in the dialog. This provides variability in height, but not in width of the element.I need to style a jQuery-ui-dialog with shadows