Set cursor position while focus on the input textbox in ASP.NET MVC MaskedTextBox control

@Html.EJS().MaskedTextBox("mask1").Mask("00000-00000").Value("93828-32132").Placeholder("Default cursor position").FloatLabelType(Syncfusion.EJ2.Inputs.FloatLabelType.Always).Render()
@Html.EJS().MaskedTextBox("mask2").Mask("00000-00000").Value("83929-43427").Placeholder("Cursor positioned at start").FloatLabelType(Syncfusion.EJ2.Inputs.FloatLabelType.Always).Focus("onfocus").Render()
@Html.EJS().MaskedTextBox("mask3").Mask("00000-00000").Value("83929-32131").Placeholder("Cursor positioned at end").FloatLabelType(Syncfusion.EJ2.Inputs.FloatLabelType.Always).Focus("onfocus1").Render()
@Html.EJS().MaskedTextBox("mask4").Mask("+1 000-000-0000").Value("234-432-4324").Placeholder("Cursor at specified position").FloatLabelType(Syncfusion.EJ2.Inputs.FloatLabelType.Always).Focus("onfocus2").Render()


<script>

    function onfocus(args) {
        //sets cursor position at start of MaskedTextBox
        args.selectionEnd = args.selectionStart;
    }

    function onfocus1(args) {
        //sets cursor position at end of MaskedTextBox
        args.selectionStart = args.selectionEnd;
    }

    function onfocus2(args) {
        //sets cursor at specified position
        args.selectionStart = 3;
        args.selectionEnd = 3;
    }

</script>

public ActionResult cursorPosition()
{
    return View();
}