<style type="text/css"> *{ margin:0px auto; padding:0px;} #wai{ width:100%; height:500px; margin-top:30px;} #top{ width:100%; height:50px;} #bottom{ width:100%; height:450px;} .item{ width:100px; height:50px; float:left; text-align:center; vertical-align:middle; line-height:50px;} .neirong{ width:100%; height:450px;} #one{ background-color:red;} #two{ background-color:green; display:none} /*设置2和3隐藏，让1为默认显示状态*/ #three{ background-color:blue; display:none} </style> </head> <body> <div id="wai"> <div id="top"> <div class="item" style="background-color:red" guanlian="one">山东</div><!--设置此选项卡背景色为红色，表示默认为选中状态--> <div class="item" guanlian="two">淄博</div> <div class="item" guanlian="three">张店</div> </div> <div id="bottom"> <div class="neirong" id="one"></div> <div class="neirong" id="two"></div> <div class="neirong" id="three"></div> </div> </div> </body> <script type="text/javascript"> //给“item”添加点击事件：点击变红色，便是为选中状态 var items = document.getElementsByClassName("item") for(var i=0;i<items.length;i++){ items[i].onclick = function(){ //让“item”恢复原色（白色） for(var i=0;i<items.length;i++){ items[i].style.backgroundColor = "white"; } //让被点击的“item”变为红色 this.style.backgroundColor = "red"; //让“item”与相应的1.2.3相关联：给“item”设置属性，分别对应1.2.3，提取出来 var id = this.getAttribute("guanlian"); var nr = document.getElementsByClassName("neirong"); for(var i=0;i<nr.length;i++){ //点击事件发生时让1.2.3全部隐藏，只让被点击的显示 nr[i].style.display = "none"; } document.getElementById(id).style.display = "block"; } } </script>