1 var isPalindrome = function(x) { 2 var xR = 0, 3 xP = x > 0 ? x : -x; 4 5 while (xP != 0) { 6 xR = xR * 10 + (xP % 10); 7 xP = Math.floor(xP / 10); 8 } 9 10 return Math.abs(xR - x) < 0.000001; 11 };