postback using javascript

         

<asp:UpdatePanel runat="server">
<ContentTemplate>
    <div>
        <asp:Literal runat="server" ID="ChildWindowResult" />
    </div>
    <hr />
    <input type="button" value="Open Dialog" onclick="window.open('MyDialog.aspx', 'Dialog');" />
    <asp:Button ID="HiddenButtonForChildPostback"  runat="server"
        OnClick="OnChildPostbackOccured" style="display: none;" />
    <asp:HiddenField runat="server" ID="PopupWindowResult"/>
</ContentTemplate>
</asp:UpdatePanel>

The MyDialog page:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.1.min.js"></script>
<script type="text/javascript">
function postData() {
    var resultField = $("input[type='hidden'][id$='PopupWindowResult']", window.opener.document);
    var parentPosDataButton = $("[id$='HiddenButtonForChildPostback']", window.opener.document);

    resultField.val($("#<%= SomeValueHiddenField.ClientID  %>").val());
    parentPosDataButton.click();
}
</script>

<asp:TextBox runat="server" ID="SomeValueHiddenField" />
<asp:Button runat="server" OnClick="PostData" Text="Click Me" />

in code behind class:

protected void PostData(object sender, EventArgs e)
{
 SomeValueHiddenField.Value = DateTime.Now.ToString();
 ClientScript.RegisterStartupScript(this.GetType(), "PostData", "postData();", true);
}