var pairs = new Array();
for(var x = 10; x < 100; x = x + 1) {
    if (x==12) {
        var insideArr = [12,33];
        pairs.push(insideArr);
    } else if (x==88) {
        var insideArr = [88,33];
        pairs.push(insideArr);
    }
}

var pairs = newArray();
for(var x=10; x < 100; x++) {
    for(var y=10; y <100; y++) {
        if ((x==12 && y==33) || (x==88 && y==33)) {
            var a = [x,y];
            pairs.push(a);
        }
    }
}