//Right JavaScript Document
document.writeln("<div id=\"dl_right\" style=\"position:absolute;right:6px;top:100px;\">");
document.writeln("<a href=http://c.koolearn.com/subject/stdj/ target=_blank>");
document.writeln("<img id=\"dl_left3\" src=http://images.koolearn.com/www/cooperation/library/2011/111221s.gif width=20 height=300 onmouseover=\"document.getElementById(\'dl_left3\').style.display=\'none\';document.getElementById(\'dl_left4\').style.display=\'block\';\">");
document.writeln("<img id=\"dl_left4\" style=\"display:none;\" src=http://images.koolearn.com/www/cooperation/library/2011/111221b.gif width=100 height=300 onmouseout=\"document.getElementById(\'dl_left3\').style.display=\'block\';document.getElementById(\'dl_left4\').style.display=\'none\';\">");
document.writeln("<\/a>");
document.writeln("<div style=\"cursor:pointer;background:#eeeeee;font-size:12px;text-align:center;\" onClick=\"document.getElementById(\'dl_left\').style.visibility=\'hidden\';document.getElementById(\'dl_right\').style.visibility=\'hidden\';\">关<\/div>");
document.writeln("<\/div>")