<!DOCTYPE HTML> <html reftest-async-scroll> <body> <div reftest-displayport-x="0" reftest-displayport-y="0" reftest-displayport-w="800" reftest-displayport-h="1000" style="overflow: scroll; position: absolute; top: 0; left: 0; bottom: 0; right: 0; z-index: 3;"> <div style="background: purple; height: 50px;"></div> </div> <div style="width: 50px; height: 50px; background: url('solidblue.png'); position: absolute; top: 100px; left: 50px; z-index: 4;"> </div> </body> </html>