function js_push(Layer,k)
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if (k=="none")
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document.write('<div id="navigation" style="position:absolute; left:-180px; top:0px; width:200px; height:95px; z-index:1"> ')
document.write('  <table width="100%" bgcolor="#ffffff" border="0" cellspacing="0" cellpadding="3" onmouseover=move(180,0) onmouseout=move(-180,0)>')
document.write('    <tr>')
document.write('      <td class=p3 bgcolor=#BDC8cc><a href="#" onclick=js_push(layer1,layer1.style.display)>浸提常用溶剂与辅助剂</a><br>')
document.write('        <div id="layer1" style="display:none">')
document.write('        　·<a href="main2.htm">浸提常用溶剂</a><br>')
document.write('        　·<a href="main2a2.htm">浸提辅助剂</a><br>')
document.write('        </div>')
document.write('        <a href="#" onclick=js_push(layer2,layer2.style.display)>浸提原理与影响浸提的因素</a><br>')
document.write('        <div id="layer2" style="display:none">')
document.write('        　·<a href="main2b1.htm">浸提原理（植物性药材）</a><br>')
document.write('        　·<a href="main2b2.htm">影响浸提的因素</a><br>')
document.write('        </div>')
document.write('        <a href="#" onclick=js_push(layer3,layer3.style.display)>常用浸提方法与设备</a><br>')
document.write('        <div id="layer3" style="display:none">')
document.write('        　·<a href="main2c1.htm">煎煮法</a><br>')
document.write('        　·<a href="main2c2.htm">浸渍法</a><br>')
document.write('        　·<a href="main2c3.htm">渗漉法</a><br>')
document.write('        　·<a href="main2c4.htm">回流法</a><br>')
document.write('        　·<a href="main2c5.htm">水蒸气蒸馏法</a><br>')
document.write('        </div>')
document.write('        <a href="#" onclick=js_push(layer4,layer4.style.display)>常用精制方法</a><br>')
document.write('        <div id="layer4" style="display:none">')
document.write('        　·<a href="main2d1.htm">水提醇沉淀法（水醇法）</a><br>')
document.write('        　·<a href="main2d2.htm">醇提水沉法（醇水法）</a><br>')
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document.write('        <a href="main2e.htm" onclick=js_push(layer5,layer5.style.display)>固体与液体的分离</a><br>')
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document.write('        　·<a href="main2e1.htm">沉降分离法</a><br>')
document.write('        　·<a href="main2e2.htm">离心分离法</a><br>')
document.write('        　·<a href="main2e3.htm">滤过分离法</a><br>')
document.write('        </div>')
document.write('        <a href="main2f.htm" onclick=js_push(layer6,layer6.style.display)>浓缩</a><br>')
document.write('        <div id="layer6" style="display:none">')
document.write('        　·<a href="main2f1.htm">影响浓缩效率的因素</a><br>')
document.write('        　·<a href="main2f2.htm">常压浓缩</a><br>')
document.write('        　·<a href="main2f3.htm">减压浓缩</a><br>')
document.write('        　·<a href="main2f4.htm">薄膜浓缩</a><br>')
document.write('        　·<a href="main2f5.htm">多效浓缩</a><br>')
document.write('        </div>')
document.write('        <a href="main2g.htm" onclick=js_push(layer7,layer7.style.display)>干燥</a><br>')
document.write('        <div id="layer7" style="display:none">')
document.write('        　·<a href="main2g1.htm">物料中所含水分的性质</a><br>')
document.write('        　·<a href="main2g2.htm">干燥速率</a><br>')
document.write('        　·<a href="main2g3.htm">影响干燥的因素</a><br>')
document.write('        　·<a href="main2g4.htm">常用干燥方法</a><br>')
document.write('        </div>')
document.write('        </td>')
document.write('      <td bgcolor="#990000" class=p3><center><font color="#ffffff">导</font><br>')
document.write('        <font color="#ffffff">航</font><br>')
document.write('        <font color="#ffffff">条</font></center></td>')
document.write('    </tr>')
document.write('  </table>')
document.write('</div>')