返回值:jQueryscrollTop(val)
概述
传递参数值时，设置垂直滚动条顶部偏移为该值。
此方法对可见和隐藏元素均有效。
参数
valString, Number
设定垂直滚动条值
示例
描述:
设置相对滚动条顶部的偏移
jQuery 代码:
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