document.write("<Select name='TradeStyle'>");
document.write("<option value=''>请选择贸易类型</option>");
document.write("<option value='1'>供应信息</option>");
document.write("<option value='2'>求购信息</option>");
document.write("<option value='3'>合作信息</option>");
document.write("<option value='4'>招商代理</option>");
document.write("</Select>");