Unicode Characters Validation in JQuery, Javascript

Attached File Name (Unicode Characters) Validation in JQuery, Javascript

var InvalidFileName = true;

            var OriginalValue = ''

            $("#HTMLListItemID").empty();

            $(".txtValidationTextBox").each(function () {

                OriginalValue = $(this).val();

                if (OriginalValue != '') {

                    var rgx = /[^\u0000-\u007F]/g;

                    var temp = $(this).val().replace(rgx, ' ');

                    var tempFileName = temp.substring(0, temp.lastIndexOf('.'));

                    var FileExtension = temp.substring(temp.lastIndexOf('.'), temp.length);

                    var tempFileNameTrimmed = tempFileName.trim();

                    if (tempFileNameTrimmed != '')

                        $(this).val(tempFileNameTrimmed + FileExtension);

                    if (temp != '' && tempFileNameTrimmed == '') {

                        InvalidFileName = false;

                        $("#HTMLListItemID").append("

The Attachment File Name ("

+ OriginalValue + ") is invalid.

");

                    }

                }

            });

            return InvalidFileName;