test.html

<script type="text/javascript">
  var myterm = false;
  var Module = {
    noInitialRun: true,
    noExitRuntime: true,
    preRun: [],
    postRun: [],
    print: function(text) { console.log(text) },
    TOTAL_MEMORY: 102428800
  };
</script>
<script type="text/javascript" src="j-called.js"></script>
<script type="text/javascript">
  // wrapper for the process_wrapper C function
  var process = Module.cwrap('process_wrapper', null, ['string']);
  Module.ccall('main', null, null, null);
  Module.run("1+1");
</script>

<script>
  /*
  var xmlhttp = new XMLHttpRequest()

xmlhttp.onreadystatechange=function() {
  if (xmlhttp.readyState==4 && xmlhttp.status==200) {
    csv = JSON.parse(xmlhttp.responseText)
  }
}

xmlhttp.open('GET', 'https://query.yahooapis.com/v1/public/yql?format=json&q=' + encodeURIComponent('SELECT * FROM csv where url="http://samplecsvs.s3.amazonaws.com/SalesJan2009.csv"'), true)
xmlhttp.send()


var rowKeys = Object.keys(csv.query.results.row[0])
var t = csv.query.results.row.map(function(x) { return rowKeys.map(function(key) { return x[key]; }).join("\t") }).join("\n")


window.prompt = function(x) { return t + "\n)\n" }
  process("tz=: 0 : 0 ")
  */
  function set() { process("a=:'abc'"); }
</script>

<textarea id="o"></textarea>
<input type=button onClick="javascript:set()" value="test">