一个div问题!急!!!!!!!!!!!1

<td width="161"><table width="161" border="0" cellspacing="0" cellpadding="0">
                          <tr>
                            <td><a href="index.htm"><img id="anniu1" src="images/anniu1.gif"  border="0" width="161" height="40" onMouseMove="Change('anniu1','anniu1-1.gif')" onMouseOut="ChangeMouseOut('anniu1','anniu1.gif') "></a></td>
                          </tr>
                          <tr>
                            <td><a href="zongcai.htm"><img id="anniu2" border="0" src="images/anniu2.gif" width="161" height="40" onMouseMove="Change('anniu2','anniu2-2.gif')" onMouseOut="ChangeMouseOut('anniu2','anniu2.gif') "></a></td>
                          </tr>
                          <tr>
                            <td><a href="gongsigaikuang.htm"><img id="anniu3" src="images/anniu3.gif" width="161" height="40" onMouseMove="Change('anniu3','anniu3-3.gif')" onMouseOut="ChangeMouseOut('anniu3','anniu3.gif')" border="0"></a></td>
                          </tr>
                          <tr>
                            <td><a href="zhuanjiazu.htm"><img id="anniu4" src="images/anniu4.gif" width="161" height="40" onMouseMove="Change('anniu4','anniu4-4.gif')" border="0" onMouseOut="ChangeMouseOut('anniu4','anniu4.gif')"></a></td>
                          </tr>
                          <tr>
                            <td><a href="chanpinxushu.htm" ><img id="anniu5" src="images/anniu5.gif"  onMouseOver="toggle('Layer1')" onMouseMove="MouseOut('Layer6');Change('anniu5','anniu5-5.gif')" onMouseOut="ChangeMouseOut('anniu5','anniu5.gif')" width="161" height="40" border="0"></a>
                             <div id="Layer1" onMouseOut="showDiv()">
                                <div id="Layer2" >
                                  <p><a  href="chanpinxushu.htm"><img id="img1" src="images/1-2.gif"  border="0" onMouseMove="Change('img1','1-1.gif')" onMouseOut="ChangeMouseOut('img1','1-2.gif'); " /></a></p>
                                </div>
                                <div id="Layer3">
                                  <p ><a  href="wubuxuexifa.htm"><img id="img2" src="images/2-3.gif" border="0" onMouseMove="Change('img2','2-2.gif')" onMouseOut="ChangeMouseOut('img2','2-3.gif') " /></a></p>
                                </div>
                                <div id="Layer4">
                                  <p><span><a  href="jiaoshiziyuanku.htm"><img id="img3" src="images/3-2.gif" border="0" onMouseMove="Change('img3','3-3.gif')" onMouseOut="ChangeMouseOut('img3','3-2.gif') " /></a></span></p>
                                </div>
                                <div id="Layer5">
                                  <p ><a  href="chanpinyoushi.htm"><img id="img4" src="images/4-3.gif" border="0" onMouseMove="Change('img4','4-4.gif')" onMouseOut="ChangeMouseOut('img4','4-3.gif') " /></a></p>
                                </div>
                              </div></span> </td>
                          </tr>
                          <tr>
                            <td><a  href="hangyejishichang.htm"><img id="anniu6" src="images/anniu6.gif" width="161" height="40" onMouseMove="Change('anniu6','anniu6-6.gif')" onMouseOut="ChangeMouseOut('anniu6','anniu6.gif')" border="0"></a></td>
                          </tr>
                          <tr>
                            <td><a  href="hangyefenxi.htm"><img id="anniu7" src="images/anniu7.gif" onMouseMove="MouseOut('Layer1');Change('anniu7','anniu7-7.gif')" onMouseOver="toggle('Layer6')" onMouseOut="ChangeMouseOut('anniu7','anniu7.gif') " width="161" height="40" border="0"></a>
                              <div id="Layer6">
                                <div id="Layer7">
                                  <p><a href="hangyefenxi.htm"><img id="img5" src="images/5-1.gif" border="0" onMouseMove="Change('img5','5-5.gif')" onMouseOut="ChangeMouseOut('img5','5-1.gif') " /></a></p>
                                </div>
                                <div id="Layer8">
                                  <p><a  href="xiaoyifenxi.htm"><img id="img6" src="images/6-1.gif" border="0" onMouseMove="Change('img6','6-6.gif')" onMouseOut="ChangeMouseOut('img6','6-1.gif') " /></a> </p>
                                </div>
                                <div id="Layer9">
                                  <p><a  href="xiaofeizhefenxi.htm"><img id="img7" src="images/7-1.gif" border="0" onMouseMove="Change('img7','7-7.gif')" onMouseOut="ChangeMouseOut('img7','7-1.gif') " /></a></p>
                                </div>
                                <div id="Layer10">
                                  <p><a  href="duibifenxi.htm"><img id="img8" src="images/8-1.gif" border="0" onMouseMove="Change('img8','8-8.gif')" onMouseOut="ChangeMouseOut('img8','8-1.gif') " /></a></p>
                                </div>
                              </div></td>
                          </tr>
                      </table></td>
                      <td>&nbsp;</td>
                    </tr>
                  </table></td>
                </tr>
              </table></td>这是个弹出DIV,当我选中<div id="Layer3">时<div id="Layer1">整个层就消失了.
我想在弹出<div id="Layer1">时可以选菜单,MOUSE离开后<div id="Layer1">整个层就消失.请高手帮帮忙!小弟谢了!