function toRgba(color, opacity) {
						var r = parseInt(color.substr(0, 2), 16);
						var g = parseInt(color.substr(2, 2), 16);
						var b = parseInt(color.substr(4, 2), 16);

						return 'rgba(' + [r, g, b, opacity].join(', ') + ')';
					}
Check if passed CSS property support specified vendor prefix 
@param {String} property
@param {String} prefix