请选择一项 北京 上海 深圳 <form name="free" method="post"> <select id="select1" name="select1" onchange="window.open(free.select1.options [selectedIndex].value,target='_blank','top=20,left=200,width=500,height= 460,scrollbars=yes,resizable=yes')"> <option selected>请选择一项</option> <option value="beijing.asp">北京</option> <option value="shanhai.asp">上海</option> <option value="tianjin.asp">天津</option> <option value="shenzhen.asp">深圳</option> <option value="guangzhou.asp">广州</option> </select>
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