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[medical] ??

jquery prev() ??? ???

??: prev()? ???? ?? ???? ? ??? ?? ?? ?? ?? ??? ?????. ???? ?? ???? ?? ?????. P ??: re.prev(???)

????:

???? ?? ??? ?, ???? ??? ?? ??? ??? ??. ??: DOM ?? ??? ???? jQuery ??? ?? ?? .prev() ???? ???? DOM ???? ??? ??? ?? ?? ??? ???? ???? ??? ? jQuery ??? ??? ? ????. ??. ? ???? $() ??? ??? ??? ??? ??? ??? ??? ???? ?????. ? ???? ???? ??? ???? ????? ????? ??? ??????.
Selector

jquery prev() ??? ?

<!DOCTYPE html>
<html>
<head>
  <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
</head>

<body>
  <div><span>Hello</span></div>
  <p class="selected">Hello Again</p>
  <p>And Again</p>

<script>
  $("p").prev(".selected").css("background", "yellow");
</script>
</body>
</html>
???? ?? ?

??? ????? ??? "???? ??" ??? ?????