javascript 实现超过32位数与运算

<script type="text/javascript">
var a = 146028888064;
var b = 8589934592;
var c = 8589934592;
var d = 4294967296;
var sd = 2147483648
function optionor() {
var barr = toBin(b);
var aarr = toBin(a);
var rearr = [];
var result = 0;
var power = 1;
for (var i = 0; i < barr.length; i++) {
result += (barr[i] & aarr[i])*power;
power = power*65536;
}
alert(result);
}
function toBin(intNum) {
var answer = [];
if(/\d+/.test(intNum)) {
  while(intNum != 0) {
   answer[answer.length]=Math.abs(intNum%65536);
   intNum = parseInt(intNum/65536);
  }
  if(answer.length == 0){
   answer = [0];
  }
   return answer;
} else {
    return [0];
}
}
</script>