JavaScript 随机一串字符串

	/**
	 * 产生随机字符串
	 * @param {Object} length 返回字符串的长度，默认32
	 * @author huxiao [e-mail]
	 */
	function randomChar(length)  {
		length = length || 32;
		var source = "abcdefghzklmnopqrstuvwxyz";
		var random = "";
		for(var i = 0;i < length; i++)  {
			random += source.charAt(Math.ceil(Math.random()*100000000)%source.length);
		}
		return random;
	}