function getPositionTop(node) { var top = node.offsetTop; var parent = node.offsetParent; while(parent != null) { top += parent.offsetTop; parent = parent.offsetParent; } return top;};
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function getPositionTop(node) { var top = node.offsetTop; var parent = node.offsetParent; while(parent != null) { top += parent.offsetTop; parent = parent.offsetParent; } return top;};
转载于:https://www.cnblogs.com/ivan5277/p/9753968.html