function dec2bin(dec){
    return (dec >>> 0).toString(2); // >>>  zero fill right shift due to signed bit
}

function bin2exclamation(bin){
    var arr = [];
    for(var i=0; i< bin.length; i++){
        arr.push(parseInt(bin.substr(i, 1)) === 1 ? 0 : 1);
    }
    return arr.join('');
}

function bin2int(bin){
    return parseInt(bin, 2);
}

var init = 100;
init = dec2bin(init);
console.log(init);

init = bin2exclamation(init);
console.log(init);

init = bin2int(init);
console.log(init);