var nav_menu_s = ' <tr>\
    <td width="780" valign="top">\
		<table width="780" border="0" cellpadding="0" cellspacing="0" background="/image/topditu.jpg" style="no-repeat;">\
	      <!--DWLayoutTable-->\
	      <tr>\
	        <td width="152" rowspan="2" valign="top"><img src="/image/logo_mzx.png"   style="padding-left:1px;" title="麦知讯" alt="麦知讯"></td>\
	        <td width="202" rowspan="2" valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>\
	        <td width="424" valign="middle" id="up_link_bg_next">　　　<!--img src="/images/xtb_c.png" />&nbsp;<a href="#"target="_blank" class="lc">其它站点</a-->　　<span class="lc" id="user_login"><a href="mzx_user.htm" class="lz">客户登陆</a></span><span class="lc"></span>　　<a href="http://www.mzhixun.com/en/" class="lz en">English</a></td>\
	      </tr>\
	      <tr>\
	        <td colspan=3 ><!--DWLayoutEmptyCell-->&nbsp;</td>\
	      </tr>\
	    </table>\
	</td>\
  </tr>\
  <tr>\
	<td height="29" valign="top">\
		<table width="780" border="0" cellpadding="0" cellspacing="0" background="/image/dhtitub.jpg" style="background-repeat:repeat-x;">\
	      <!--DWLayoutTable-->\
	      <tr>\
	        <td width="10" height="29" valign="top"><img src="/image/dhtitua.jpg" width="10" height="29"></td>\
	        <td width="610" valign="top">\
	          ';
	var nav_menu_e = '</td>\
	        <td width="158" valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>\
	      </tr>\
		</table>\
	 </td>\
  </tr>  \
    ';