Extends the jQuery.support object to CSS Properties

jquery.support.cssproperty.js

/**
 * jQuery.support.cssProperty
 * To verify that a CSS property is supported
 * (or any of its browser-specific implementations)
 *
 * @param p css property name
 * @param rp optional, if set to true, the css property name will be returned
 * instead of a boolean support indicator
 * @return {mixed}
 *
 * @author: Axel Jack Fuchs (Cologne, Germany)
 * @date: 08-29-2010 18:43
 * @url https://gist.github.com/jackfuchs/556448
 *
 * Example: $.support.cssProperty('boxShadow');
 * Returns: true
 *
 * Example: $.support.cssProperty('boxShadow', true);
 * Returns: 'MozBoxShadow' (On Firefox4 beta4)
 * Returns: 'WebkitBoxShadow' (On Safari 5)
 */
$.support.cssProperty = (function() {
  function cssProperty(p, rp) {
    var b = document.body || document.documentElement,
        s = b.style;

    // No css support detected
    if (typeof s == 'undefined') { return false; }

    // Tests for standard prop
    if (typeof s[p] == 'string') { return rp ? p : true; }

    // Tests for vendor specific prop
    var v = ['Moz', 'Webkit', 'Khtml', 'O', 'ms', 'Icab'],
        p = p.charAt(0).toUpperCase() + p.substr(1),
        vl = v.length;

    for (var i=0; i<vl; i++) {
        if (typeof s[v[i] + p] == 'string') { return rp ? (v[i] + p) : true; }
    }

    return false;
  }

  return cssProperty;
})();

Good work. I added a return false; too.