is it possible to use script in class

private void EnsurePanelFix()
      {
        if (this.Page.Form != null)
        {
          String fixupScript = @"
          _spBodyOnLoadFunctionNames.push(""_initFormActionAjax"");
          function _initFormActionAjax()
          {
          if (_spEscapedFormAction == document.forms[0].action)
          {
            document.forms[0]._initialAction =
              document.forms[0].action;
          }
        }
        var RestoreToOriginalFormActionCore =
          RestoreToOriginalFormAction;
        RestoreToOriginalFormAction = function()
        {
        if (_spOriginalFormAction != null)
        {
          RestoreToOriginalFormActionCore();
          document.forms[0]._initialAction = document.forms[0].action;
        }
        }";
        ScriptManager.RegisterStartupScript(this,
          typeof(nameofclass/namespace), "UpdatePanelFixup",
          fixupScript, true);
        }
      }
    }
}