var oFlag = document.getElementById('flag');
var oDiv = document.getElementById('node');
//鼠标移入事件
oDiv.onmouseover = function() {
oFlag.style.display = 'block';
}
//鼠标移出事件
oDiv.onmouseout = function() {
oFlag.style.display = 'none';
}
js 鼠标移入移出事件
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转载自blog.csdn.net/Misnice/article/details/104626016
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