Register JavaScripts in 2 ways

You can register your JavaScript in server side by 2 ways

        ' The very first control added to the form must be the AJAX script manager.
		Dim cl As ClientScriptManager = Me.ClientScript
		Dim cstype As Type = Me.GetType()

		cl.RegisterClientScriptInclude(cstype, "DefaultScript", ResolveClientUrl("~/JScript Files/Test.js"))

        myScriptManager = New ScriptManager
        myScriptManager.ID = "__PageScriptManager"
        myScriptManager.EnablePageMethods = True

        myScriptManager.RegisterStartupScript(Me, GetType(Page), "StartManualTearDownScript", "manualTearDown.init();", True)

        If Me.PageAccess = PageAccessType.SecurePage Then
            Dim ref As New System.Web.UI.ScriptReference("JScript Files/Secure.js")
            myScriptManager.Scripts.Add(ref)
        End If

        myScriptManager.AsyncPostBackTimeout = WebConfigurationHelper.AsyncPostBackTimeout

        myHtmlForm.Controls.Add(myScriptManager)