<script type="text/javascript"> function HTMLEncode(html) { var temp = document.createElement ("div"); (temp.textContent != null) ? (temp.textContent = html) : (temp.innerText = html); var output = temp.innerHTML; temp = null; return output; } function HTMLDecode(text) { var temp = document.createElement("div"); temp.innerHTML = text; var output = temp.innerText || temp.textContent; temp = null; return output; } var html = "<br>dffdfqqqqq"; var encodeHTML = HTMLEncode(html); alert("方法一：" +encodeHTML); var decodeHTML = HTMLDecode(encodeHTML); alert("方法一：" +decodeHTML); </script>