New song format

Changed over the song parser and accompanying code to be inline with the new, as suggested in issue fulldecent#28.

In Javascript/airgap.html

@@ -17,34 +17,34 @@
  </br>
  <input type="button" value="Play Song" onclick="start()"></br></br>
  <textarea id="logs" style="width:70%;min-height:100px">Tested with Chrome at 1560Khz</textarea>
+ <p style="font-size:14px">Feel free to edit the code below or copy and paste any <em>valid</em> code.<br>Column one is time in <i>milliseconds</i>, and column two is <i>frequency</i>.</p>
  <textarea id="tones" style="width:70%;min-height:200px">
-Feel free to edit the code below. Just make sure you keep to the format that it's in and have all of the punctuation.
-:beep frequency=2673 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2093 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2673 length=790;
-:beep frequency=2349 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2349 length=790;
-:beep frequency=2673 length=400;
-:beep frequency=3136 length=400;
-:beep frequency=3136 length=790;
-:beep frequency=2673 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2093 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2673 length=400;
-:beep frequency=2349 length=400;
-:beep frequency=2093 length=790;</textarea>
+400 2673
+400 2349
+400 2093
+400 2349
+400 2673
+400 2673
+790 2673
+400 2349
+400 2349
+790 2349
+400 2673
+400 3136
+790 3136
+400 2673
+400 2349
+400 2093
+400 2349
+400 2673
+400 2673
+400 2673
+400 2673
+400 2349
+400 2349
+400 2673
+400 2349
+790 2093</textarea>
  <div style="font-size:14px">Ported by Yeo Quan Yang. Credits to the original author William Entriken @https://github.com/fulldecent</div><br/>
  <div style="font-size:14px">Project site at <a href="https://github.com/fulldecent/system-bus-radio">https://github.com/fulldecent/system-bus-radio</a></div><br/>
  <div style="font-size:14px">List of computers that work and what frequency to try at <a href="https://github.com/fulldecent/system-bus-radio/blob/master/TEST-DATA.tsv">https://github.com/fulldecent/system-bus-radio/blob/master/TEST-DATA.tsv</a></div>

In Javascript/airgap.js

@@ -28,23 +28,18 @@ function square_am_signal(time, freq) {
 }
 
 function start() {
- var song = document.getElementById("tones").value.split(":");
+ var song = document.getElementById("tones").value.split("\n");
  var length = song.length;
- var i = 1,
- line, time, freq;
- while (1 <= length) {
+ var line, time, freq;
+ for (var i = 0; i < length; i++) {
  line = song[i].split(" ");
- if (line[0] == "beep") {
- freq = +line[0].split("=")[1];
- time = +line[2].split("=")[1].slice(0, -1);
- square_am_signal(time, freq);
- }
- if (line[0] == "delay") {
+ if (line[1] == "0") {
  // delay
  }
- if (song[i] == "end") {
- i = 1;
+ else {
+ freq = +line[1];
+ time = +line[0];
+ square_am_signal(time, freq);
  }
- i++;
  }
 }