Decode HTML entities

gistfile1.js

var utils = {},
    decodeEl;

/**
 * Returns a version of the specified string with all HTML entities
 * decoded. DO NOT use the output of this function with innerHTML if you're
 * working with user-supplied content!
 *
 * @method decodeEntities
 * @param {String} string string to decode
 * @return {String} decoded string
 */
if (Y.UA.ie) {
    // IE strips whitespace from innerHTML assignments, so we have to use a
    // hack for our hack.
    utils.decodeEntities = function (string) {
        if (!decodeEl) {
            decodeEl = document.createElement('textarea');
        }

        var chars = [' ', "\t", "\n"],
            len   = chars.length,
            html  = string,
            c, i, value;

        for (i = 0; i < len; ++i) {
            c    = chars[i];
            html = html.replace(new RegExp(c, 'g'), '__#' +
                    c.charCodeAt(0) + '__;');
        }

        decodeEl.innerHTML = '';
        decodeEl.innerHTML = html;

        value = decodeEl.value;

        for (i = 0; i < len; ++i) {
            c     = chars[i];
            value = value.replace(new RegExp('__#' +
                    c.charCodeAt(0) + '__;', 'g'), c);
        }

        return value;
    };
} else {
    utils.decodeEntities = function (string) {
        if (!decodeEl) {
            decodeEl = document.createElement('textarea');
        }

        decodeEl.innerHTML = '';
        decodeEl.innerHTML = string;

        return decodeEl.value;
    };
}