function openwin() {
OpenWindow = window.open("", "打印预览", "height=600px, width=900px, top=20px, toolbar=no,scrollbars=" + scroll + ",menubar=no");
OpenWindow.document.write("<title></title>");
OpenWindow.document.write("<body>");
OpenWindow.document.write("<div style='width:820px;margin-left:auto;margin-right:auto;margin-top:20px;'>");//居中显示内容
OpenWindow.document.write(window.divMess.innerHTML);//需要打印的内容
OpenWindow.document.write("</div>");
OpenWindow.document.write("<script type='text/javascript'>window.print();setTimeout('window.close()',1000);<\/script>");//打印此页，并在1秒后关闭此页
OpenWindow.document.write("</body>");
OpenWindow.document.write("</html>");
OpenWindow.document.close();
}
