Pass parameter to Javascript function from ASP code behind

Question

I have a long process and I want to show a user a progress bar where I pass a parameter (percentage) to a Javascript function in my Webform with masterpage.

I have this:

Answer 1

Try this way

    string updateProgress = "18%";
    ClientScript.RegisterStartupScript(this.GetType(), "updateProgress", "updateProgress('" + updateProgress + "');", true);

Script AS

ASPX page