make the date in textbox as arabic date

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C#

ASP.NET

hi all ,
this is my textbox

<asp:TextBox ID="RecordBDate" runat="server" MaxLength="10"  >

the user enter dnd then it's completed /then user enter mm and it'sautocomplete / then the user enter yyyy
this is the fumction doing this

<script type="text/javascript">
        function addSlashes(input) {
            var v = input.value;
            if (v.match(/^\d{2}$/) !== null) {
                input.value = v + '/';
            } else if (v.match(/^\d{2}\/\d{2}$/) !== null) {
                input.value = v + '/';
            }
        }
</script>

what i want to do is the user can enter the date in arabiclanguge how can i do it ?