Injecting javascript from ASP.NET webcontrol

I'm making an ASP.NET webforms application and I have a problem with injecting a script into the page from a web control. The script is located in the same folder as control:

Screenshot1

So I'm trying like:

[ToolboxData("<{0}:MyWebControl runat=server></{0}:MyWebControl>")]
[System.Drawing.ToolboxBitmap(typeof(MyWebControl))]
public class MyWebControl : Image
{

    //...

    protected override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);


        string scriptStr = "<script src=\"my_script.js\" type=\"text/javascript\">";
        ClientScriptManager csm = Page.ClientScript;
        csm.RegisterClientScriptBlock(this.Page.GetType(), "MyScriptTag", scriptStr);

        //...
    }

}

When I check if the script got injected successfully, Chrome gives me this:

Screenshot2

I guess the problem is connected with script src=\"my_script.js\", but I tried changing the path for long with no success.

Looking forward for some help :)

You need the path to the javascript file to be relative to the page that the user control is being rendered within. I'm assuming that the user control is being loaded by your index.aspx in your web project. Add a Scripts folder to the web project and move the javascript file there. Then, change the src to

src=\"/Scripts/my_script.js\"