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1、关键代码:JAVAsCRipt:代码如下:vardome=document.getelementbyID("dome");//获取节点vardome1=document.getelementbyID("dome1");vardome2=document.getelementbyID("dome2");varspeed=50;//设置向上轮动的速度dome2.innerhtml=dome1.innerhtml;//复制节点关键语句functionmovetop(){if(dome1.offse....