標籤：style class blog code color html
<!DOCTYPE html><html><head><script src="/jquery/jquery-1.11.1.min.js"></script><script>$(document).ready(function(){ $("#a").mouseover(function(){$(this).css("background-color","yellow");$(this).siblings().css("background-color","white"); $("p").css(‘display‘,‘none‘);$("#po").css(‘display‘,‘block‘); }); $("#b").mouseover(function(){$(this).css("background-color","yellow");$(this).siblings().css("background-color","white"); $("p").css(‘display‘,‘none‘);$("#po1").css(‘display‘,‘block‘); }); $("#c").mouseover(function(){$(this).css("background-color","yellow");$(this).siblings().css("background-color","white"); $("p").css(‘display‘,‘none‘);$("#po2").css(‘display‘,‘block‘); });});</script></head><body><h2 id=‘a‘ >這是標題1</h2><h2 id=‘b‘>這是標題2</h2><h2 id=‘c‘ >這是標題23</h2><p id=‘po‘ style="background-color:#ff0000">這是一個段落23。</p><p id=‘po1‘ style="background-color:#00ff00">這是一個段落2222。</p><p id=‘po2‘ style="background-color:#0000ff">這是一個段落。2222222</p><button>返回 p 元素的背景色</button></body></html>
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