/*!
* Autogrow Textarea Plugin Version v2.0
* http://www.technoreply.com/autogrow-textarea-plugin-version-2-0
*
* Copyright 2011, Jevin O. Sewaruth
*
* Date: March 13, 2011
*/
jQuery.fn.autoGrow = function () {
    return this.each(function () {
        // Variables
        var colsDefault = this.cols;
        var rowsDefault = this.rows;

        //Functions
        var grow = function () {
            growByRef(this);
        }

        var growByRef = function (obj) {
            var linesCount = 0;
            var lines = obj.value.split('\n');

            for (var i = lines.length - 1; i >= 0; --i) {
                linesCount += Math.floor((lines[i].length / colsDefault) + 1);
            }

            if (linesCount >= rowsDefault)
                obj.rows = linesCount + 1;
            else
                obj.rows = rowsDefault;
        }

        var characterWidth = function (obj) {
            var characterWidth = 0;
            var temp1 = 0;
            var temp2 = 0;
            var tempCols = obj.cols;

            obj.cols = 1;
            temp1 = obj.offsetWidth;
            obj.cols = 2;
            temp2 = obj.offsetWidth;
            characterWidth = temp2 - temp1;
            obj.cols = tempCols;

            return characterWidth;
        }

        // Manipulations
        this.style.width = "auto";
        this.style.height = "auto";
        this.style.overflow = "hidden";
        this.style.width = ((characterWidth(this) * this.cols) + 6) + "px";
        this.onkeyup = grow;
        this.onfocus = grow;
        this.onblur = grow;
        growByRef(this);
    });
};