// corners

document.write("<img style='position:absolute; top:0; left:0;' src='layout/top_left_corner_gry.png' alt='corner' />");

document.write("<img style='position:absolute; top:0; right:0;' src='layout/top_right_corner_gry.png' alt='corner' />");

document.write("<img style='position:absolute; bottom:0; right:0;' src='layout/bottom_right_corner_gry.png' alt='corner' />");

document.write("<img style='position:absolute; bottom:0; left:0;' src='layout/bottom_left_corner_gry.png' alt='corner' />");