WatermarkTextBox Description
TextBoxWatermark is an ASP.NET AJAX extender that can be attached to an ASP.NET TextBox control to get "watermark" behavior. When a watermarked TextBox is empty, it displays a message to the user with a custom CSS style. Once the user has typed some text into the TextBox, the watermarked appearance goes away. The typical purpose of a watermark is to provide more information to the user about the TextBox itself without cluttering up the rest of the page.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<style type="text/css">
.wm
{
color: Gray
}
</style>
<script src="http://ajax.microsoft.com/ajax/jquery/jquery-1.3.2.js" type="text/javascript"></script>
<script src="http://ajax.microsoft.com/ajax/beta/0911/Start.debug.js" type="text/javascript"></script>
<script src="http://ajax.microsoft.com/ajax/beta/0911/extended/ExtendedControls.debug.js" type="text/javascript"></script>
<script type="text/javascript">
Sys.require(Sys.components.watermark, function() {
$("#name").watermark("<enter a name>", "wm");
});
</script>
</head>
<body>
<input type="text" id="name" size="50" />
</body>
</html>
<div class="demoheading">TextBoxWatermark Demonstration</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
First name:
<asp:TextBox ID="TextBox1" CssClass="unwatermarked" Width="150" runat="server" /><br />
<ajaxToolkit:TextBoxWatermarkExtender ID="TextBoxWatermarkExtender1" runat="server"
TargetControlID="TextBox1"
WatermarkText="Type First Name Here"
WatermarkCssClass="watermarked" />
Last name:
<asp:TextBox ID="TextBox2" CssClass="unwatermarked" Width="150" runat="server" /><br /><br />
<ajaxToolkit:TextBoxWatermarkExtender ID="TextBoxWatermarkExtender2" runat="server"
TargetControlID="TextBox2"
WatermarkText="Type Last Name Here"
WatermarkCssClass="watermarked" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" />
<br /><br />
<asp:Label ID="Label1" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
<ajaxToolkit:TextBoxWatermarkExtender ID="TBWE2" runat="server"
TargetControlID="TextBox1"
WatermarkText="Type First Name Here"
WatermarkCssClass="watermarked" />
