<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>innerHTML</title></head><body><h1 id="con">javascript<h1><p>xxx</p><script type="text/javascript">var mychar=document.getElementById("con");document.write("原来:"+mychar.innerHTML+"<br>");mychar.innerHTML="HELLO WORLD"document.write("现在："mychar.innerHTML);</script></body>
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guozhchun
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document.write("现在："mychar.innerHTML);
// 这里错了，少了个 '+'，应该是：document.write("现在：" + mychar.innerHTML);
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