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<%@ Page Language="VB" %>
<script runat="server">
Sub mapMenu_Click(ByVal sender As Object, ByVal e As ImageMapEventArgs)
Select Case e.PostBackValue
Case "ToUpper"
txtText.Text = txtText.Text.ToUpper()
Case "ToLower"
txtText.Text = txtText.Text.ToLower()
Case "Erase"
txtText.Text = String.Empty
End Select
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ImageMap PostBack</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ImageMap
id="mapMenu"
ImageUrl="http://www.java2s.com/style/logo.png"
HotSpotMode="PostBack"
Runat="server" OnClick="mapMenu_Click">
<asp:RectangleHotSpot
PostBackValue="ToUpper"
Left="0"
Top="0"
Right="100"
Bottom="30"
AlternateText="To Uppercase" />
<asp:RectangleHotSpot
PostBackValue="ToLower"
Left="100"
Top="0"
Right="200"
Bottom="30"
AlternateText="To Uppercase" />
<asp:RectangleHotSpot
PostBackValue="Erase"
Left="200"
Top="0"
Right="300"
Bottom="30"
AlternateText="To Uppercase" />
</asp:ImageMap>
<br />
<asp:TextBox
id="txtText"
TextMode="MultiLine"
Columns="40"
Rows="5"
Runat="server" />
</div>
</form>
</body>
</html>
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