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function fetch(url, id) {
var req = new XMLHttpRequest();
req.onload = function() {
var element = document.getElementById(id);
var node = document.createElement("div");
node.innerHTML = this.response;
element.appendChild(node);
};
req.open("GET", url);
req.send();
}
window.onload = function() {
var num_songs = 0;
var add_song_button = document.getElementById('add-song-button');
add_song_button.onclick = function() {
num_songs += 1;
fetch(window.location + '/song/new/' + num_songs, 'form-songs');
};
};
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