<!doctype html> <html> <head> <meta charset="utf-8"> <title>tab定时切换</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script> </head> <body> <style> #nav_list{ height:25px; width:300px; background:#999;} #nav_list div{ float:left; width:100px; line-height:25px; text-align:center;} #nav_list div.cur{ background:#C60; color:#fff;} #nav_con{ width:298px; border:1px solid #999; height:100px;} #nav_con div{ display:none;} </style> <div id="nav_list"> <div class="cur">tab1</div> <div>tab2</div> <div>tab3</div> </div> <div id="nav_con"> <div style="display:block;">tab1tab1tab1tab1tab1tab1tab1</div> <div>tab2tab2tab2tab2tab2tab2tab2</div> <div>tab3tab3tab3tab3tab3tab3tab3</div> </div> <script type="text/javascript"> var time;//定义定时器 var i=-1;//定义开始显示的内容，由于下面执行了i++;所以只能给i赋值-1 var offset=2000;//设置相隔2秒就切换 var index_n=$('#nav_list>div').length;//获取切换个数 var nav_top=$('#nav_list>div'); var nav_con=$('#nav_list + div>div'); //可以写成var nav_con=$('#nav_con>div') function roll(){ i++; if(i>index_n){//如果i>切换个数后，重新给i赋值=0 i=0 } slide(i); time=setTimeout(roll,offset);//设置定时器 } function slide(i){ nav_top.eq(i).addClass('cur').siblings().removeClass('cur');//把当前的div的高亮 nav_con.eq(i).show().siblings().hide(); } roll();//执行函数 </script> </body> </html>