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I have not tried this but does this work?

<asp:ListItem Value="javascript:return variableName"></asp:ListItem>

You would have ot have the variable declared and assigned in the code above this control.

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HiI want to asign javasecript variable value in asp.net code, how iin this line of code where "?" is mentioned<asp:ListItem Value='?' ></asp:ListItem>I am waitingthanks

Hi I think this could help you. I have made an experiment in my page. See how it works. :)
<HTML>	<HEAD>  <title>WebForm1</title>  <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">  <meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE">  <meta content="JavaScript" name="vs_defaultClientScript">  <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">  <script language="javascript">	function ValueGet(){  var svalue;  document.getElementById("DropDownList1").value ="222";  svalue=	document.getElementById("DropDownList1").value;  document.getElementById("divLabel").value= svalue;	}  </script>	</HEAD>	<body MS_POSITIONING="GridLayout" onload="ValueGet()">  <form id="Form1" method="post" runat="server"> 	 <asp:adrotator id="AdRotator1" runat="server" AdvertisementFile="_xml/ads.xml"></asp:adrotator> 	 <asp:DropDownList id="DropDownList1" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 64px"    runat="server">    <asp:ListItem Value="111" Selected="true">111</asp:ListItem>    <asp:ListItem Value="222">222</asp:ListItem> 	 </asp:DropDownList> 	 <asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 16px; POSITION: absolute; TOP: 104px" runat="server"    Text="Button"></asp:Button> 	 <asp:Label id="lblvalue" style="Z-INDEX: 103; LEFT: 16px; POSITION: absolute; TOP: 144px" runat="server">Label</asp:Label> 	 <INPUT id="divLabel" style="Z-INDEX: 104; LEFT: 16px; POSITION: absolute; TOP: 176px" type="text"></form>	</body></HTML>

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