Hi..

In the first Page_Load, I am activating a javascript function to make an ImageButton change between 2 images with an interval.

This works fine.

Now when pressing this imagebutton, the Page_Load event will fire the second time and all this is happening in an updatepanel which means a partial postback.

The question is how to execute the javascript function stopbk() in the Page_Load event in this scenario as I cant just put it in the "Onload". How can I make that work?

Code is below:

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["SecondLoad"] != null)
        {
            //How to activate stopbk() ?
            Label1.Text = "Second Load";
        }


        if (Session["SecondLoad"] == null)
        {
            Label1.Text = "First Load";
            Session["SecondLoad"] = "dummy";
            body1.Attributes.Add("Onload", "startbk()");
        }
    }
    protected void ImageButton6_Click(object sender, ImageClickEventArgs e)
    {
        //
    }






<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>




<asp:UpdatePanel ID="UpdatePanel4" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<script type="text/javascript">
    var TimerProps = {
        refTimer: null,
        index: 0
    }
    function startTimer() {
        if (TimerProps.index > 1) {
            TimerProps.index = 0;
            document.getElementById('<%= ImageButton6.ClientID %>').src = "http://www.abc.com/images/inboxKuvert.jpg";
            TimerProps.index += 1;
        }
        else {
            document.getElementById('<%= ImageButton6.ClientID %>').src = "http://www.abc.com/images/Transparent.gif";
            TimerProps.index += 1;
        }
    }
    function startbk() {
        TimerProps.refTimer = setInterval("startTimer()", 550)
    }


    function stopbk() {
        clearInterval(TimerProps.refTimer)
    }
</script>


<asp:ImageButton ID="ImageButton6" runat="server" Height="12px" Width="16px"
 ImageUrl="http://www.abc.com/images/inboxKuvert.jpg" onclick="ImageButton6_Click" />


    <br />
    <asp:Label ID="Label1" runat="server" Text="-"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>

ASPusers

The question is how to execute the javascript function stopbk() in the Page_Load event in this scenari

ScriptManager.RegisterStartupScript()....

http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanager.registerstartupscript.aspx

Thanks.

Thank you,

I have tried to understand the example but are not 100% sure of how the parameters should be set.

My attempt is as below but are not sure if I have done it correctly, I think I miss something?

Example:

RegisterStartupScript( Control control, Type type, string key, string script, bool addScriptTags );

My attempt:
RegisterStartupScript(ImageButton6, GetType(), "???", "stopbk()", true); 

It seems to work with the example below:

Thank you!

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["SecondLoad"] != null)
        {
            ScriptManager.RegisterStartupScript(this, this.GetType(), "stopbk", "stopbk();", true);
            Label1.Text = "Second Load";
        }


        if (Session["SecondLoad"] == null)
        {
            Label1.Text = "First Load";
            Session["SecondLoad"] = "dummy";
            ScriptManager.RegisterStartupScript(this, this.GetType(), "startbk", "startbk();", true);
        }
    }
    protected void ImageButton6_Click(object sender, ImageClickEventArgs e)
    {
        //
    }




<script type="text/javascript">
    var TimerProps = {
        refTimer: null,
        index: 0
    }


    function startTimer() {
        if (TimerProps.index > 1) {
            TimerProps.index = 0;
            document.getElementById('<%= ImageButton6.ClientID %>').src = "http://www.abc.com/images/inboxKuvert.jpg";
            TimerProps.index += 1;
        }
        else {
            document.getElementById('<%= ImageButton6.ClientID %>').src = "http://www.abc.com/images/Transparent.gif";
            TimerProps.index += 1;
        }
    }
    function startbk() {
        TimerProps.refTimer = setInterval("startTimer()", 550)
    }
    function stopbk() {
        clearInterval(TimerProps.refTimer)
    }
    </script>