how to find which control has invocked the javascript function

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hello friends

I have javascript function

function fillVC(e)
{
    .....
}

I call this function in two control events

1.  <asp:DropDownList ID="ddlGeo" runat="server" Width="100px" 
                     onChange="fillVC(this);">
                </asp:DropDownList>   (in .aspx file)

2.  <asp:Button runat="server" id="btnSearch" Text="Search" 
                        onclick="btnSearch_Click"/>

protected void btnSearch_Click(object sender, EventArgs e)
    {
        this.GVDatabind();
        ClientScript.RegisterStartupScript(typeof(Page), "Open", "fillVC(this);", true);
    }        (in code behind file)

Can anyone tell me how I can determine which control has called the javascript, based on that I can take different action in same function

Any idea how to do this??

Thanks in advance

Posted 20-Jun-12 18:16pm

dhage.prashant01

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Jim Jos · Answer 1 · 2012-06-20T23:30:00

Based on the ID of the control we could use the control.type to check the type of the control.

JavaScript

function fillVC(controlClientId)
        {

            
            var control = document.getElementById(controlClientId);

            alert(control.type);

            if (control != null && control.type == "submit") {
                //control is a button
                alert('button')

            }

            else if (control != null && control.type == "select-one") {

                //control is dropdownlist 
                alert('dropdown')

 	}

You need to call the function like this...

ASP.NET

<asp:dropdownlist id="ddlGeo" runat="server" width="100px" onchange="fillVC(this.id);" xmlns:asp="#unknown">
</asp:dropdownlist>