Validating Taxonomy Metadata Field in Javascript (Multiple Value Field)

In my previous post, I had mentioned about performing validation of a single value taxonomy field. This script does validation of a multi-value field.

This and the previous script works for how many ever taxonomy fields you have in the edit form. Now what I am trying to do is validate and prevent the user from saving the document if the same value repeats in those fields.
*******************************

<script type="text/javascript">
        function PreSaveAction() {
            //alert("calling before save")

            var iRef = document.getElementsByTagName("div");

            var arr = new Array();
            var duplicate = false;
            var errors = new Array();

            for (var i = 0; i < iRef.length; i++) {
                if (iRef[i].id.indexOf("editableRegion") >= 0) {
                    var itemFound = iRef[i];
                    if (itemFound.innerText.length == 1) {
                        continue;
                    }

                    var splitItems = itemFound.innerText.split(";");
                    for (k = 0; k < splitItems.length; k++) {
                        for (var j = 0; j < arr.length; j++) {

                            if (splitItems[k].length > 1) {
                                if (arr[j].indexOf(splitItems[k].replace(/^\s+/, "")) >= 0) {
                                    duplicate = true;
                                    var foundInArray = false;
                                    for (var m = 0; m < errors.length; m++) {
                                        if (errors[m] == splitItems[k])
                                        { foundInArray = true; }
                                    }
                                    if (!foundInArray) {
                                        errors.push(splitItems[k]);


                                    }
                                    // return false;
                                }
                            }

                        }
                    }
                    arr.push(itemFound.innerText);


                }
            }
            if (duplicate) {
                alert("Classification (" + errors.join(',') + ") already exists! \n\nPlease choose a different classification.")

                return false;
            }
            return true;
        }</script>

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