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document.write('      <td class=p3 bgcolor=#BDC8cc>')
document.write('        <a href="#" onclick=js_push(layer1,layer1.style.display)>丹药的含义与种类</a><br>')
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document.write('        　·<a href="main2.htm">丹药的含义</a><br>')
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document.write('        <a href="#" onclick=js_push(layer2,layer2.style.display)>膜剂</a><br>')
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document.write('        　·<a href="main2b1.htm">膜剂的含义与特点</a><br>')
document.write('        　·<a href="main2b2.htm">成膜材料的质量要求</a><br>')
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