diff --git a/examples/mathjax.html b/examples/mathjax.html
index 425cc09..6c0cfae 100644
--- a/examples/mathjax.html
+++ b/examples/mathjax.html
@@ -10,7 +10,8 @@
             <header>
                 <h1>支持Latex(MathJax)科学公式</h1>
 				<p>基于MathJax.js：<a href="http://www.mathjax.org/" target="_blank">http://www.mathjax.org/</a></p>
-                <p>注：默认不开启，影响实时预览的响应速度;</p>            
+                <p>注1：默认不开启，影响实时预览的响应速度;</p>
+                <p>注2：可以自定义MathJax加载URL，国内可以采用这个CDN，http://cdn.bootcss.com/mathjax/2.4.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML</p>         
             </header>
             <div class="editormd" id="test-editormd">                
                 <script type="text/markdown">####科学公式
@@ -27,7 +28,13 @@ $$\sin(\alpha)^{\theta}=\sum_{i=0}^{n}(x^i + \cos(f))$$</script>
         <link rel="stylesheet" href="../dist/css/editormd.css" />
         <script src="../src/js/editormd.js"></script>   
         <script type="text/javascript">
-            $(function() {                
+            $(function() {      
+                //自定义MathJax加载URL，适用于国内
+                editormd.mathjaxURL = "http://cdn.bootcss.com/mathjax/2.4.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML";
+                
+                //适用于全球/国外
+                //editormd.mathjaxURL  = "http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML";
+                
                 var testEditor = editormd("test-editormd", {
 					width: "90%",
 					height: 480,