diff --git a/lib/command.js b/lib/command.js
index 3e92548..ebafe2a 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -33,7 +33,6 @@
 
   outputPath = function(source, root) {
     var dir, fileName, srcDir;
-
     fileName = path.basename(source, path.extname(source)) + extension;
     srcDir = path.dirname(source);
     dir = program.output ? path.join(program.output, root === '.' ? srcDir : srcDir.slice(root.length)) : srcDir;
@@ -57,7 +56,6 @@
       if (stats.isDirectory()) {
         return fs.readdir(source, function(err, files) {
           var file, index, _i, _len, _results;
-
           if (err) {
             throw err;
           }
@@ -88,7 +86,6 @@
 
   parseHtml = function(file, input, root) {
     var absolute, base, debug, err, inline, output;
-
     try {
       absolute = program.absolute, base = program.base, debug = program.debug, inline = program.inline;
       output = md(input, {
@@ -121,7 +118,6 @@
 
   writeMarkdown = function(source, markdown, root) {
     var mdDir, mdPath, write;
-
     mdPath = outputPath(source, root);
     mdDir = path.dirname(mdPath);
     write = function(err) {
@@ -148,7 +144,6 @@
 
   exports.run = function() {
     var err, source, _i, _len, _results;
-
     if (process.platform !== 'win32') {
       process.on('SIGTERM', function() {
         return exit();
diff --git a/lib/md.js b/lib/md.js
index c1d3d37..0a6096b 100644
--- a/lib/md.js
+++ b/lib/md.js
@@ -58,7 +58,6 @@
 
   padLeft = function(str, times, padStr) {
     var i, _i;
-
     if (str == null) {
       str = '';
     }
@@ -91,7 +90,6 @@
   HtmlParser = (function() {
     function HtmlParser(html, options) {
       var defaultValue, doc;
-
       this.html = html != null ? html : '';
       this.options = options != null ? options : {};
       this.atLeft = this.atNoWS = this.atP = true;
@@ -125,6 +123,12 @@
         });
         this.win = doc.createWindow();
       }
+      if (this.win.Node == null) {
+        this.win.Node = {
+          ELEMENT_NODE: 1,
+          TEXT_NODE: 3
+        };
+      }
     }
 
     HtmlParser.prototype.append = function(str) {
@@ -136,7 +140,6 @@
 
     HtmlParser.prototype.attr = function(ele, attribute, direct) {
       var value;
-
       if (direct == null) {
         direct = true;
       }
@@ -152,7 +155,6 @@
     HtmlParser.prototype.code = function() {
       var old,
         _this = this;
-
       old = this.inCode;
       this.inCode = true;
       return function() {
@@ -177,9 +179,8 @@
 
     HtmlParser.prototype.isVisible = function(ele) {
       var display, err, properties, property, style, visibility, visible, _i, _len;
-
       style = this.attr(ele, 'style', false);
-      properties = style != null ? style.match(R_HIDDEN_STYLES) : void 0;
+      properties = style != null ? typeof style.match === "function" ? style.match(R_HIDDEN_STYLES) : void 0 : void 0;
       visible = true;
       if (properties != null) {
         for (_i = 0, _len = properties.length; _i < _len; _i++) {
@@ -205,7 +206,6 @@
 
     HtmlParser.prototype.li = function() {
       var str;
-
       str = this.inOrderedList ? "" + (this.order++) + ". " : '* ';
       str = padLeft(str, (this.listDepth - 1) * 2);
       return this.append(str);
@@ -213,7 +213,6 @@
 
     HtmlParser.prototype.nonPreProcess = function(str) {
       var value;
-
       str = str.replace(/\n([ \t]*\n)+/g, '\n');
       str = str.replace(/\n[ \t]+/g, '\n');
       str = str.replace(/[ \t]+/g, ' ');
@@ -228,7 +227,6 @@
     HtmlParser.prototype.ol = function() {
       var inOrderedList, order,
         _this = this;
-
       if (this.listDepth === 0) {
         this.p();
       }
@@ -262,7 +260,6 @@
 
     HtmlParser.prototype.outputLater = function(str) {
       var _this = this;
-
       return function() {
         return _this.output(str);
       };
@@ -282,7 +279,6 @@
 
     HtmlParser.prototype.parse = function() {
       var container, i, link, tag, unhandledTags, _i, _len, _ref;
-
       this.buffer = '';
       if (!this.html) {
         return this.buffer;
@@ -307,7 +303,6 @@
       if (this.options.debug) {
         unhandledTags = ((function() {
           var _ref1, _results;
-
           _ref1 = this.unhandled;
           _results = [];
           for (tag in _ref1) {
@@ -326,7 +321,6 @@
     HtmlParser.prototype.pre = function() {
       var old,
         _this = this;
-
       old = this.inPre;
       this.inPre = true;
       return function() {
@@ -335,8 +329,7 @@
     };
 
     HtmlParser.prototype.process = function(ele) {
-      var after, after1, after2, childNode, err, href, i, level, skipChildren, src, suffix, summary, title, _base, _i, _len, _ref, _ref1, _ref2;
-
+      var after, after1, after2, childNode, err, href, i, level, skipChildren, src, suffix, summary, title, _base, _i, _len, _ref, _ref1;
       if (!this.isVisible(ele)) {
         return;
       }
@@ -350,7 +343,6 @@
             this.p();
             this.output("" + (((function() {
               var _i, _results;
-
               _results = [];
               for (i = _i = 1; 1 <= level ? _i <= level : _i >= level; i = 1 <= level ? ++_i : --_i) {
                 _results.push('#');
@@ -450,7 +442,7 @@
                 if (title) {
                   href += " \"" + title + "\"";
                 }
-                suffix = this.options.inline ? "(" + href + ")" : "[" + ((_ref = (_base = this.linkMap)[href]) != null ? _ref : _base[href] = this.links.push(href) - 1) + "]";
+                suffix = this.options.inline ? "(" + href + ")" : "[" + ((_base = this.linkMap)[href] != null ? (_base = this.linkMap)[href] : _base[href] = this.links.push(href) - 1) + "]";
                 this.output('[');
                 this.atNoWS = true;
                 after = this.outputLater("]" + suffix);
@@ -467,7 +459,7 @@
               case 'IFRAME':
                 skipChildren = true;
                 try {
-                  if ((_ref1 = ele.contentDocument) != null ? _ref1.documentElement : void 0) {
+                  if ((_ref = ele.contentDocument) != null ? _ref.documentElement : void 0) {
                     this.process(ele.contentDocument.documentElement);
                   }
                 } catch (_error) {
@@ -489,9 +481,9 @@
           this.thrown(err, ele.tagName);
         }
         if (!skipChildren) {
-          _ref2 = ele.childNodes;
-          for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
-            childNode = _ref2[_i];
+          _ref1 = ele.childNodes;
+          for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
+            childNode = _ref1[_i];
             this.process(childNode);
           }
         }
@@ -504,7 +496,6 @@
     HtmlParser.prototype.pushLeft = function(str) {
       var old,
         _this = this;
-
       old = this.left;
       this.left += str;
       if (this.atP) {
@@ -537,7 +528,6 @@
     HtmlParser.prototype.ul = function() {
       var inOrderedList, order,
         _this = this;
-
       if (this.listDepth === 0) {
         this.p();
       }
diff --git a/src/md.coffee b/src/md.coffee
index 40e51de..45a82eb 100644
--- a/src/md.coffee
+++ b/src/md.coffee
@@ -149,6 +149,12 @@ class HtmlParser
         url:      @options.base
       @win = doc.createWindow()
 
+    # Create the Node constants if Node doesn't exist (i.e. when running in IE < 9).
+    unless @win.Node?
+      @win.Node =
+        ELEMENT_NODE:                 1
+        TEXT_NODE:                    3
+
   # Append `str` to the buffer string.
   append: (str) ->
     @buffer += @last if @last?
@@ -190,7 +196,7 @@ class HtmlParser
   # Determine whether or not the specified element is visible based on its CSS style.
   isVisible: (ele) ->
     style      = @attr ele, 'style', no
-    properties = style?.match R_HIDDEN_STYLES
+    properties = style?.match?(R_HIDDEN_STYLES)
     visible    = yes
 
     # Test all relevant CSS properties for possible hiding behaviours.