案例:ASP.NET案例     状态:不可编辑再运行    进入竖版
 运行结果 
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<script  runat="server">
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Sub choose_image(Sender As Object, e As EventArgs)
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   image1.Src = select1.Value
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End Sub
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</script>
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<html>
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<body>
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<form runat="server">
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<select id="select1" runat="server">
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   <option value="/img/eg_smile.gif">笑脸</option>
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   <option value="/img/eg_bulbon.gif">灯泡</option>
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   <option value="/img/eg_mouse.jpg">鼠标</option>
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</select>
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<input type="submit" runat="server" value="显示图像"
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OnServerClick="choose_image">
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<br /><br />
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<img id="image1" src="/img/eg_smile.gif" runat="server" />
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</form>
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</body>
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</html>
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