Question

I have a Javascript. I want to call only at page load. I dont want to call at postbacks.. (Asp.net 3,5)

Answer 1

In your code behind:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        ClientScript.RegisterStartupScript(GetType(), "key", "someFunction();", true);
    }
}