How do you show or hide a button based on user action?

Well I have a web page asp.net(page1.aspx) amm user can choose two options A/B if user chooses a when he is in page2.aspx i want a javascript was execute

function(receive parameter)
{
}

But if he chose option B function never will be executed.

I want to do, if user chooses A will see a asp button, but if he ch开发者_StackOverflowoose option b he is not going to be the button

Do you want something like this?

Page 1  - Button 1 (to Page 2 with Button on page 2)
          Button 2 (to Page 2 without Button on Page 2)

Page 2

You are using ASP.Net so use the 'Code Behind' and server side controls. The most simplest concept would be to use GET variables, aka QueryStrings.

Create 2 Buttons on Page 1.

<asp:Button ID="Button1" runat="server" onclick="Button1Click" 
        Text="Button 1" />
    <asp:Button ID="Button2" runat="server" onclick="Button2Click" 
        Text="Button 2" />

Add actions to those buttons (Page 1)

 protected void Button1Click(object sender, EventArgs e)
    {
        Response.Redirect("~/Page2.aspx?Option=1",true);
    }

    protected void Button2Click(object sender, EventArgs e)
    {
        Response.Redirect("~/Page2.aspx?Option=2",true);
    }

On Page 2 Load event

 protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.QueryString["Option"] != null)
        {
            if (Request.QueryString["Option"] == "1")
            {
                Response.Write("Option 1");
            }
            else if (Request.QueryString["Option"] == "2")
            {
                Response.Write("Option 2");
            }

        }
    }

You could use a querystring parameter...

Page1

protected void Button1_Click(object sender, EventArgs e){
    Response.Redirect("~/page2.aspx?showButton=true", true);
}

protected void Button2_Click(object sender, EventArgs e){
    Response.Redirect("~/page2.aspx?showButton=false", true);
}

Page2

protected void Page_Load(object sender, EventArgs e){
    someButton.Visible = (Request[@"showButton"] == @"true");
}

The example isn't that elegant, but should get you started on what you want.