JavaScript中onclick函数return false 未被触发是怎么回事？

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <title>My Gallery</title> </head> <body> <h1>snapshots</h1> <ul> <li> <a href="images/do or die.jpg" onclick="showPic(this);return false;" title="do or die">DO</a> </li> <li> <a href="images/hand.jpg" onclick="showPic(this);return false;" title="hand">HAND</a> </li> <li> <a href="images/phrase.jpg" onclick="showPic(this);return false;" title="phrase">Phrase</a> </li> </ul> <img id="placeholder" src="images/dog.jpg" alt="My Gallery"/> <script> function showPic(whichpic) {var source=whichpic.getAttribute ("href"); var placeholder=document.getElenmentById ("placeholder"); placeholder.setAttribute("src",source);} </script> </body> </html>

首先是你的id获取单词都拼错了，其次是a标签href指向问题和点击事件冲突<!DOCTYPE html><html><head><meta charset="utf-8"/><title>My Gallery</title></head><body ><h1>snapshots</h1><ul><li> <a href="javascript:;" date-href="zhc1.jpg" onclick="showPic(this);return false;" title="do or die">DO</a> </li> <li> <a href="javascript:;" date-href="zhc2.jpg" onclick="showPic(this);return false;" title="hand">HAND</a> </li> <li> <a href="javascript:;" date-href="zhc3.jpg" onclick="showPic(this);return false;" title="phrase">Phrase</a> </li></ul><img id="placeholder" src="zixun_video_pic.jpg" alt="My Gallery"/><script>  function showPic(whichpic){     var source=whichpic.getAttribute ("date-href");     var placeholder=document.getElementById ("placeholder");        placeholder.setAttribute("src",source); }</script></body></html>

JavaScript中onclick函数return false 未被触发是怎么回事？

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