/**
* 产生随机字符串
* @param {Object} length 返回字符串的长度,默认32
* @author huxiao kskr@qq.com
*/
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;
}