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當我滾動div #3
尋找它的內部div,我想凍結div id 2 ...我該怎麼做?如何凍結div滾動時檢查內部的div
<div id='1' style="height:15%; border:1px solid black">Questions</div>
<div id='2' style="height:30%; border:1px solid black">Freeze this</div>
<div id='3' style="height:55%; border:1px solid black">Scroll this
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
<div class='innerDiv' style="border:1px solid black;height:50px">a</div>
</div>
如何凍結時滾動檢查的
檢查[jQuery:修復當瀏覽器滾動到div](http://stackoverflow.com/questions/8644248/jquery-fix-div-when-browser-scrolls-to-it) – Mohammad