demo; http://thcstranquangkhai.edu.vn/
đi dạo dạo thấy code này cũng hay nên lượm về cho ae ai cần
paste đoạn code này vào vị trí bất kỳ trong file 'footer_extended.tpl'
document.write('<style type="text/css">body{padding-bottom:0px}</style><img style="position:fixed;z-index:99999;top:0;left:0" src="https://s5.postimg.org/3v7c56h5j/topleft.png"/><img style="position:fixed;z-index:99999;top:0;right:0" src="https://s5.postimg.org/8v9dqvc5z/topright.png"/><div style="position:fixed;z-index:99999;bottom:-50px;left:0;width:100%;height:104px;background:url() repeat-x bottom left;"></div><img style="position:fixed;z-index:99999;bottom:0px;left:0px" src="https://s5.postimg.org/kyepefn87/bottomleft.png"/><img style="position:fixed;z-index:9999;bottom:0px;right:0px" src="https://s5.postimg.org/dwgrs8jmf/bottomright.png"/><div style="position:fixed;z-index:99999;bottom:3px;right:3px; font-size:11px;color:#8D8D8D;">by <a href="http://thcstranquangkhai.edu.vn/">phavaphu</a></div>');