This solves the broblem:
<script type="text/javascript" src="~/Content/Script/Script.js" charset="windows-1251"></script>
How can I set charset with in Bundles? Code like this:
Dim bundle As ScriptBundle = New ScriptBundle("~/bundles/global").Include("~/js/jquery.min.js",
"~/js/jquery.cookie.js",
"~/js/plugins/nicescroll/jquery.nicescroll.min.js",
"~/js/plugins/imagesLoaded/jquery.imagesloaded.min.js",
"~/js/plugins/jquery-ui/jquery.ui.core.min.js")
How To insert charset in my files js in bundle and mandatory respect order
<%: Scripts.Render("~/bundles/global") %>