JS生成GUID(全局唯一标识符)

function getGuid()
{
    var guid = "";
    for (var i = 1; i <= 32; i++){
        var flag = Math.floor(Math.random() * 10);
        //如果是偶数就设置成为
        if(flag%2 == 0) {
            //全大写
            var n = Math.floor(flag*2.4) + 65;
            //全小写
            // var n = Math.floor(flag*2.4) + 97;
            var n = String.fromCharCode(n);
            guid += n;
        } else {
            guid += flag;
        }        
      // if((i==8)||(i==12)||(i==16)||(i==20))
      //   guid += "-";
    }
    return guid;   
}

console.log(getGuid());

//获取字符
var a = 98;
console.log(String.fromCharCode(a));
//获取编码
var code = 'ABCDEFG';
console.log(code.charCodeAt(0) + ',' + code.charCodeAt(1));