Normalize IE9 URL parsing. Fix for videojs#1764

IE9 appends the port number to the host property of anchor tags on http pages. Strip the port for http and https so that it behaves like everyone else.

src/js/lib.js

@@ -692,6 +692,15 @@ vjs.parseUrl = function(url) {
     details[props[i]] = a[props[i]];
   }
 
+  // IE9 adds the port to the host property unlike everyone else. If
+  // a port identifier is added for standard ports, strip it.
+  if (details.protocol === 'http:') {
+    details.host = details.host.replace(/:80$/, '');
+  }
+  if (details.protocol === 'https:') {
+    details.host = details.host.replace(/:443$/, '');
+  }
+
   if (addToBody) {
     document.body.removeChild(div);
   }

test/unit/lib.js

@@ -1,4 +1,13 @@
-module('Lib');
+var createElement;
+
+module('Lib', {
+  setup: function() {
+    createElement = document.createElement;
+  },
+  teardown: function() {
+    document.createElement = createElement;
+  }
+});
 
 test('should create an element', function(){
   var div = vjs.createEl();
@@ -282,6 +291,27 @@ test('should parse the details of a url correctly', function(){
   equal(vjs.parseUrl('http://example.com:1234').port, '1234', 'parsed example url port');
 });
 
+test('should strip port from hosts using http or https', function() {
+  var url;
+
+  // attempts to create elements will return an anchor tag that
+  // misbehaves like IE9
+  document.createElement = function() {
+    return {
+      hostname: 'example.com',
+      host: 'example.com:80',
+      protocol: 'http:',
+      port: '80',
+      pathname: '/domain/relative/url',
+      hash: ''
+    };
+  };
+
+  url = videojs.parseUrl('/domain/relative/url');
+  ok(!(/.*:80$/).test(url.host), ':80 is not appended to the host');
+});
+
+
 test('vjs.findPosition should find top and left position', function() {
   var d = document.createElement('div'),
     position = vjs.findPosition(d);