我自己在图片中写了onclick事件，但是点击时没有反应，代码如下：
<img id="img1" src="/interaction/teacher/informanage/teachinves/dtree/img/heart_056.gif" onclick="return img1_onclick("img1")"/> <img id="
<img id="img1" src="/interaction/teacher/informanage/teachinves/dtree/img/heart_056.gif" onclick="return img1_onclick("img1")"/> <img id="
