jQuery implements carousel chart (width full screen and height fixed)

html部分

 

 

    
   
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css部分

1 * {
2     margin: 0;
3     padding: 0;
4
}

5 .cm-banner {
6     width: 100%;
7     height: 300px;
8     overflow: hidden;
9     cursor: pointer;
10     position: relative;
11
}

12 13 .cm-banner-in {
14     width: 1100px;
15     height: 300px;
16     position: absolute;
17     top: 0;
18     left: 50%;
19     margin-left: -550px;
20
}

21 22 #cm_banner_list li {
23     display: none;
24     position: absolute;
25     top: 0;
26     left: 0;
27
}

28 29 .cm-banner-num {
30     width: 100%;
31     position: absolute;
32     bottom: 0;
33     text-align: center;
34     z-index: 2;
/*如果没有在这里设置层次小圆点的点击效果无法触发*/
35
}

36 37 .cm-banner-num li {
38     width: 10px;
39     margin: 10px 3px;
40     height: 10px;
41     background-color: #fff;
42     border-radius: 5px;
43     -webkit-border-radius: 5px;
44     display: inline-block;
45     opacity: 0.7;
46
}

47 48 .cm-banner-num .active {
49     background-color: #3982de;
50
}

51 52 .cm-banner-arrow {
53     position: absolute;
54     top: 50%;
55     margin-top: -22px;
56     opacity: 0.5;
57     display: none;
58
}

59 60 #cm_prev {
61     left: 0;
62
}

63 64 #cm_next {
65     right: 0;
66
}

js部分

 1 $(function(){ 2     //鼠标移入显示箭头按钮 3     $('.cm-banner').hover(function(){ 4         $('.cm-banner-arrow').show(); 5         clearInterval(cm_timer); 6     },function(){ 7         $('.cm-banner-arrow').hide(); 8         cm_timer = setInterval(function(){ 9             i++;10             if(i > cm_length - 1){11                 i = 0;12             }13             $('#cm_banner_list li').eq(i).fadeIn(800).siblings().fadeOut(800);14             cm_toggle(i);15         },2500);16     });17 18     //鼠标移入箭头按钮高亮19     $('.cm-banner-arrow').hover(function(){20         $(this).css('opacity','1');21     },function(){22         $(this).css('opacity','0.5');23     });24 25     //初始化必要变量26     var i = 0;27     var cm_length = $('#cm_banner_list li').length;28     var cm_toggle = function(point){29         $('#cm_banner_num li').eq(point).addClass('active').siblings().removeClass('active');30     };31 32     //动态添加小圆点33     for(j = 0;j < cm_length;j++){34         $('#cm_banner_num').append('<li></li>');35     }36 37     //给第一个小圆点添加样式38     $('#cm_banner_num li').first().addClass('active');39 40     //给第一张图片添加样式41     $('#cm_banner_list li').first().css('display','block');42 43     //鼠标点击左箭头切换44     $('#cm_prev').click(function(){45         i--;46         if(i < 0){47             i = cm_length - 1;48         }49         $(&#39;#cm_banner_list li&#39;).eq(i).fadeIn(800).siblings().fadeOut(800);50         cm_toggle(i);51     });52 53     //鼠标点击右箭头切换54     $(&#39;#cm_next&#39;).click(function(){55         i++;56         if(i > cm_length - 1){57             i = 0;58         }59         $('#cm_banner_list li').eq(i).fadeIn(800).siblings().fadeOut(800);60         cm_toggle(i);61     });62 63     //鼠标点击圆点切换64     $('#cm_banner_num li').click(function(){65         var cm_index = $(this).index();66         $('#cm_banner_list li').eq(cm_index).fadeIn(800).siblings().fadeOut(800);67         i = cm_index;68         cm_toggle(cm_index);69     });70 71     //自动播放72     cm_timer = setInterval(function(){73         i++;74         if(i > cm_length - 1){75             i = 0;76         }77         $('#cm_banner_list li').eq(i).fadeIn(800).siblings().fadeOut(800);78         cm_toggle(i);79     },2500);80 });

 

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