Code : Lên hay xuống : <center> <div id='top-buttom_image'> <a href='javascript:scroll(0,0)' title=' Về đầu trang'><img alt='Lên đầu trang' border='2' src="http://farm4.static.flickr.com/3496/3463533286_ee8ffe62cd_o.gif "></a><br/> <a href='javascript:scroll(0,9999999)' title='Về cuối trang '><img alt='Xuống cuối trang' border='2' src="http://farm4.static.flickr.com/3583/3437500265_69cea7f1f2_o.gif "></a> </div> </center> . Code : Lên hay xuống : <center> <div id='top-buttom_image'>