javascript如何实现水仙花数

for(var i=100;i<1000;i++)

            {

                var a=parseInt(i/100);

                // var b=parseInt((i-a*100)/10);

                var b=parseInt((i/10)%10);

                var c=parseInt(i%10);

                // document.write(b);

                if(i==a*a*a+b*b*b+c*c*c)

                {

                    document.write(i+"<br/>");

                }

            }