Remove Duplicates and Extra Characters from Text Fields using jQuery/Javascript

Remove Duplicates and Extra Characters from Text Fields using jQuery/Javascript

HTML

<h2>Remove Duplicates and Extra Characters from Text Fields</h2>

<form id="form" action="" method="post">
<fieldset>

    <label for="include_values">Include this text:</label><br />
<textarea id="include_values" name="include_values" class="descBoxes" rows="2" cols="80"></textarea>
<p>Enter text separated by commas</p>

    <label for="exclude_values">Exclude this text:</label><br />
<textarea id="exclude_values" name="exclude_values" class="descBoxes" rows="2" cols="80"></textarea>
<p>Enter text separated by commas</p>

</fieldset>
</form>

CSS

@import url(http://fonts.googleapis.com/css?family=Lato:300,400);
body {
    padding: 10px;
    font-family:'Lato';
    font-weight: 400;
}
h2 {
    margin-bottom: 20px;
    color: #4679bd;
    font-weight: 400;
    font-size: 26px;
}

label { font-size: 1em; }
p { color: #999999; margin-bottom: 2em; }

.descBoxes {
    min-width: 50em !important;
    max-width: 50em !important;
    min-height: 5em !important;
    max-height: 5em !important;
    overflow: auto !important;
}

JavaScript

$(document).ready(function() {
    $("#include_values, #exclude_values").change(function() {
        cleanIncludeExclude($(this).attr('id'));
    });

});

/**
 * Format the Include and Exclude text values
 * Remove Duplicates
 * Remove leading and trailing blanks, extra commas, returns, etc.
 */

function cleanIncludeExclude(idToClean) {
    var stringToClean = jQuery.trim($('#' + idToClean).val());

    //if there is no include/exclude strings then don't continue
    if (stringToClean.length < 1) {
        return (false);
    }

    //Replace characters that we dont want
    stringToClean = stringToClean.replace(/[,]{2,}/g, ',').replace(/%/g, '').replace(/_/g, '').replace(/\r\n|\n|\r/g, ",");

    //Split string to an array at every comma 
    var tempArr = stringToClean.split(' ');
    var uniqueArray = new Array();

    //search for duplicates, if found then delete
    for (var i = 0; i < tempArr.length; i++) {
        tempArr[i] = jQuery.trim(tempArr[i]);

        if (tempArr[i] == '') {
            tempArr.splice(i, 1);
            i--;
        }

        if (uniqueArray[tempArr[i]] != undefined) {
            tempArr.splice(i, 1);
            i--;
        }
        uniqueArray[tempArr[i]] = '';
    }
    $('#' + idToClean).val(tempArr.join(','))
}