一次读4 byte(这是个int -2147483648 - 2147483647), 然后转换成string, 然后转char array去读出
function createBinaryString (nMask) {
// nMask must be between -2147483648 and 2147483647
for (var nFlag = 0, nShifted = nMask, sMask = ""; nFlag < 32; nFlag++, sMask += String(nShifted >>> 31), nShifted <<= 1);
return sMask;
}
var string1 = createBinaryString(11);
var string2 = createBinaryString(4);
var string3 = createBinaryString(1);
alert(string1);
// prints 00000000000000000000000000001011, i.e. 11
var bits=string1.split("");
var b26 = bits[25];
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