js實現無縫輪播
本文實例為大傢分享瞭js實現文字無縫輪播的具體代碼，供大傢參考，具體內容如下
所用到的知識點：
innerHTML 獲取或設置某個對象的內容
scrollTop 滾動條滾動的距離，此屬性是系統內置定義好的
offsetHeight 獲取或設置對象的高度
setInterval() 開啟定時器
clearInterval() 關閉定時器
html佈局結構如下：
其中con2是用來儲存復制con1內容的容器
<body> <div id="mooc"> <!-- 頭部 --> <h3 id="moocTitle">最新課程<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self">更多>></a> </h3> <!-- 頭部結束 --> <!-- 中間 --> <div id="moocBox"> <ul id="con1"> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >1.學會html5 絕對的逆襲（案例）</a><span>2013-09-18</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >2.tab頁面切換效果（案例）</a><span>2013-10-09</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >3.圓角水晶按鈕制作（案例）</a><span>2013-10-21</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >4.HTML+CSS基礎課程(系列)</a><span>2013-11-01</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >5.分頁頁碼制作（案例）</a><span>2013-11-06</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >6.導航條菜單的制作（案例）</a><span>2013-11-08</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >7.信息列表制作(案例)</a><span>2013-11-15</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >8.下拉菜單制作(案例)</a><span>2013-11-22</span></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >9.如何實現“新手引導”效果</a><span>2013-12-06</span></li> </ul> <ul id="con2"> </ul> </div> <!-- 中間結束 --> </div> </body>
css樣式如下：
<style>
body {
font-size: 12px;
line-height: 24px;
text-algin: center; /* 頁面內容居中 */
}
* {
margin: 0px;
padding: 0px; /* 去掉所有標簽的marign和padding的值 */
}
ul {
list-style: none; /* 去掉ul標簽默認的點樣式 */
}
a img {
border: none; /* 超鏈接下，圖片的邊框 */
}
a {
color: #333;
text-decoration: none; /* 超鏈接樣式 */
}
a:hover {
color: #ff0000;
}
#mooc {
width: 399px;
border: 5px solid #ababab;
-moz-border-radius: 15px; /* Gecko browsers */
-webkit-border-radius: 15px; /* Webkit browsers */
border-radius: 15px;
box-shadow: 2px 2px 10px #ababab;
margin: 50px auto 0;
text-align: left; /* 讓新聞內容靠左 */
}
/* 頭部樣式 */
#moocTitle {
height: 62px;
overflow: hidden; /* 這個一定要加上，內容超出的部分要隱藏，免得撐高頭部 */
font-size: 26px;
line-height: 62px;
padding-left: 30px;
background-image: -moz-linear-gradient(top, #f05e6f, #c9394a); /* Firefox */
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #f05e6f), color-stop(1, #c9394a)); /* Saf4+, Chrome */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#8fa1ff', endColorstr='#f05e6f', GradientType='0'); /* IE*/
border: 1px solid ##f05e6f;
-moz-border-radius: 8px 8px 0 0; /* Gecko browsers */
-webkit-border-radius: 8px 8px 0 0; /* Webkit browsers */
border-radius: 8px 8px 0 0;
color: #fff;
position: relative;
}
#moocTitle a {
position: absolute;
right: 10px;
bottom: 10px;
display: inline;
color: #fff;
font-size: 12px;
line-height: 24px;
}
/* 底部樣式 */
#moocBot {
width: 399px;
height: 10px;
overflow: hidden; /* 這個一定要加上，內容超出的部分要隱藏，免得撐高底部結構 */
}
/* 中間樣式 */
#moocBox {
height: 144px;
width: 335px;
margin-left: 25px;
margin-top: 10px;
overflow: hidden; /* 這個一定要加，超出的內容部分要隱藏，免得撐高中間部分 */
}
#mooc ul li {
height: 24px;
}
#mooc ul li a {
width: 180px;
float: left;
display: block;
overflow: hidden;
text-indent: 15px;
height: 24px;
}
#mooc ul li span {
float: right;
color: #999;
}
</style>
js代碼如下：
<script>
var area=document.getElementById('moocBox');
area.scrollTop=0;//scrollTop初始化對象滾動條的距離，此屬性是系統標準化的
//獲取第一個ul對象
var con1=document.getElementById('con1');
//獲取第二個ul對象
var con2=document.getElementById('con2');
//將第一個ul對象裡的內容給第二個ul對象
con2.innerHTML=con1.innerHTML;
//封裝函數 用來判斷滾動條的距離與盒子高度的關系
function scrollUp(){
if(area.scrollTop>=con1.offsetHeight){
area.scrollTop=0;
}else{
area.scrollTop++;
}
}
//聲明定時器
var timer=null;
//解決暴力用戶 在開啟定時器之前最好先清除一下定時器
clearInterval(timer);
//開始定時器
timer=setInterval(scrollUp,50);
//為對象設置綁定鼠標滑過
area.onmouseover=function(){
clearInterval(timer);
}
//為對象綁定鼠標劃出
area.onmouseout=function(){
timer=setInterval(scrollUp,50);
}
</script>
以上就是本文的全部內容，希望對大傢的學習有所幫助，也希望大傢多多支持WalkonNet。