logical　error

<script type="text/javascript" src="http://lightbox.on.coocan.jp/prototype_x.js"></script>
<script type="text/javascript">
Ajax.Request.prototype.setRequestHeaders = function() {}
function testCall() {
new Ajax.Request('http://lightbox.on.coocan.jp/ver.php', {
	method: "get",
	asynchronous: true,
	onComplete: function(response) {
		console.log(response.responseText);
	}
});
}

</script>
<input type="button" value="実行" onclick='testCall();'>

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new window.XDomainRequest()},
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};
--------------------------------------------
      if ( Prototype.Browser.IE ) {
          var ieparam1 = this.options.onComplete;
          var ieparam2 = this.transport;
          this.transport.onload = function() { ieparam1(ieparam2) };
      }
      else {
          this.transport.onreadystatechange = this.onStateChange.bind(this);
      }

<?
header( "Access-Control-Allow-Origin: *" );
header( "Content-Type: text/javascript; Charset=shift_jis" );
header( "Expires: Wed, 31 May 2000 14:59:58 GMT" );

$ver = phpversion();
print "document.write( '$ver' );";

?>