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js实现图片自动的滚动效果
自动滚动，主要思路是用js自带的setInterval方法。
定义和用法
setInterval() 方法可按照指定的周期（以毫秒计）来调用函数或计算表达式。
setInterval() 方法会不停地调用函数，直到 clearInterval() 被调用或窗口被关闭。由 setInterval() 返回的 ID 值可用作 clearInterval() 方法的参数。
语法
setInterval(code,millisec[,"lang"])
参数
code 必需。要调用的函数或要执行的代码串。
millisec 必须。周期性执行或调用 code 之间的时间间隔，以毫秒计。
返回值
一个可以传递给 Window.clearInterval() 从而取消对 code 的周期性执行的值。
简单的例子，仅供参考：
style
*{ margin:0; padding:0; list-style:none;}
#box{ width:840px; border:1px solid #000; height:210px; margin:30px auto; position:relative; overflow:hidden;}
#box ul{ position:absolute; left:0; top:0;}
#box ul li{ width:200px; height:200px; float:left; padding:5px;}
/style
script
window.onload=function(){
var oBox=document.getElementById('box');
var oUl=oBox.children[0];
var aLi=oUl.children;
//复制一份内容
oUl.innerHTML+=oUl.innerHTML;
oUl.style.width=aLi.length*aLi[0].offsetWidth+'px';
setInterval(function(){
var l=oUl.offsetLeft+10;
if(l=0){
l=-oUl.offsetWidth/2;
}
oUl.style.left=l+'px';
},30);
};
/script
/head
body
div id="box"
ul
liimg src="img/1.jpg" width="200"/li
liimg src="img/2.jpg" width="200"/li
liimg src="img/3.jpg" width="200"/li
liimg src="img/4.jpg" width="200"/li
/ul
/div
/body
JS如何实现图片滑动？
script language="javascript" type="text/javascript"
//图片滚动展示 Start
var counts = 4;
//大图//
img1 = new Image();
img1.src = 'images/1.jpg';
img2 = new Image();
img2.src = 'images/2.jpg';
img3 = new Image();
img3.src = 'images/3.jpg';
img4 = new Image();
img4.src = 'images/4.jpg';
var smallImg = new Array();
//小图
smallImg[0] = 'images/index_adb1.gif';
smallImg[1] = 'images/index_adb2.gif';
smallImg[2] = 'images/index_adb3.gif';
smallImg[3] = 'images/index_adb4.gif';
//链接地址
url1 = new Image();
url1.src = ' ';
url2 = new Image();
url2.src = ' ';
url3 = new Image();
url3.src = ' ';
url4=new Image();
url4.src=' '
//alt值
alt1 = new Image();
alt1.alt = '';
alt2 = new Image();
alt2.alt = '';
alt3 = new Image();
alt3.alt = ' ';
alt4 = new Image();
alt4.alt='';
////欢迎来到标准之路.
var nn = 1;
var key = 0;
function change_img() {
if (key == 0) {
key = 1;
} else if (document.all) {
document.getElementById("pic").filters[0].Apply();
document.getElementById("pic").filters[0].Play(duration = 2);
}
eval('document.getElementById("pic").src=img' + nn + '.src');
eval('document.getElementById("url").href=url' + nn + '.src');
eval('document.getElementById("pic").alt=alt' + nn + '.alt');
if (nn == 1) {
document.getElementById("url").target = "_blank";
document.getElementById("url").style.cursor = "pointer";
} else {
document.getElementById("url").target = "_blank"
document.getElementById("url").style.cursor = "pointer"
}
for ( var i = 1; i = counts; i++) {
document.getElementById("xxjdjj" + i).className = 'axx';
}
document.getElementById("xxjdjj" + nn).className = 'bxx';
nn++;
if (nn counts) {
nn = 1;
}
tt = setTimeout('change_img()', 7000);
}
function changeimg(n) {
nn = n;
window.clearInterval(tt);
change_img();
}
function imageshow() {
document.write('div class="picshow_main"');
document.write('diva id="url"img id="pic" class="imgbig" //a/div');
document.write('div class="picshow_change"');
for ( var i = 0; i counts; i++) {
document.write('a href="javascript:changeimg(' + (i + 1)
+ ');" id="xxjdjj' + (i + 1)
+ '" class="axx" target="_self"img src="' + smallImg[i]
+ '"/a');
}
document.write('/div/div');
change_img();
}
//图片滚动展示 End
/script
script language="javascript" type="text/javascript"
imageshow();
/script
JS控制图片向左向右移动的代码
这段代码可以： !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " " html xmlns=" " head meta http-equiv="Content-Type" content="text/html; charset=gb2312" / title图片/title script language="javascript" !-- //图片滚动列表 mengjia 070927 var Speed_1 = 10; //速度(毫秒) var Space_1 = 20; //每次移动(px) var PageWidth_1 = 116 * 3; //翻页宽度 var interval_1 = 7000; //翻页间隔 var fill_1 = 0; //整体移位 var MoveLock_1 = false; var MoveTimeObj_1; var MoveWay_1="right"; var Comp_1 = 0; var AutoPlayObj_1=null; function GetObj(objName){if(document.getElementById){return eval('document.getElementById("'+objName+'")')}else{return eval('document.all.'+objName)}} function AutoPlay_1(){clearInterval(AutoPlayObj_1);AutoPlayObj_1=setInterval('ISL_GoDown_1();ISL_StopDown_1();',interval_1)} function ISL_GoUp_1(){if(MoveLock_1)return;clearInterval(AutoPlayObj_1);MoveLock_1=true;MoveWay_1="left";MoveTimeObj_1=setInterval('ISL_ScrUp_1();',Speed_1);} function ISL_StopUp_1(){if(MoveWay_1 == "right"){return};clearInterval(MoveTimeObj_1);if((GetObj('ISL_Cont_1').scrollLeft-fill_1)%PageWidth_1!=0){Comp_1=fill_1-(GetObj('ISL_Cont_1').scrollLeft%PageWidth_1);CompScr_1()}else{MoveLock_1=false} AutoPlay_1()} function ISL_ScrUp_1(){if(GetObj('ISL_Cont_1').scrollLeft=0){GetObj('ISL_Cont_1').scrollLeft=GetObj('ISL_Cont_1').scrollLeft+GetObj('List1_1').offsetWidth} GetObj('ISL_Cont_1').scrollLeft-=Space_1} function ISL_GoDown_1(){clearInterval(MoveTimeObj_1);if(MoveLock_1)return;clearInterval(AutoPlayObj_1);MoveLock_1=true;MoveWay_1="right";ISL_ScrDown_1();MoveTimeObj_1=setInterval('ISL_ScrDown_1()',Speed_1)} function ISL_StopDown_1(){if(MoveWay_1 == "left"){return};clearInterval(MoveTimeObj_1);if(GetObj('ISL_Cont_1').scrollLeft%PageWidth_1-(fill_1=0?fill_1:fill_1+1)!=0){Comp_1=PageWidth_1-GetObj('ISL_Cont_1').scrollLeft%PageWidth_1+fill_1;CompScr_1()}else{MoveLock_1=false} AutoPlay_1()} function ISL_ScrDown_1(){if(GetObj('ISL_Cont_1').scrollLeft=GetObj('List1_1').scrollWidth){GetObj('ISL_Cont_1').scrollLeft=GetObj('ISL_Cont_1').scrollLeft-GetObj('List1_1').scrollWidth} GetObj('ISL_Cont_1').scrollLeft+=Space_1} function CompScr_1(){if(Comp_1==0){MoveLock_1=false;return} var num,TempSpeed=Speed_1,TempSpace=Space_1;if(Math.abs(Comp_1)PageWidth_1/2){TempSpace=Math.round(Math.abs(Comp_1/Space_1));if(TempSpace1){TempSpace=1}} if(Comp_10){if(Comp_1-TempSpace){Comp_1+=TempSpace;num=TempSpace}else{num=-Comp_1;Comp_1=0} GetObj('ISL_Cont_1').scrollLeft-=num;setTimeout('CompScr_1()',TempSpeed)}else{if(Comp_1TempSpace){Comp_1-=TempSpace;num=TempSpace}else{num=Comp_1;Comp_1=0} GetObj('ISL_Cont_1').scrollLeft+=num;setTimeout('CompScr_1()',TempSpeed)}} function picrun_ini(){ GetObj("List2_1").innerHTML=GetObj("List1_1").innerHTML; GetObj('ISL_Cont_1').scrollLeft=fill_1=0?fill_1:GetObj('List1_1').scrollWidth-Math.abs(fill_1); GetObj("ISL_Cont_1").onmouseover=function(){clearInterval(AutoPlayObj_1)} GetObj("ISL_Cont_1").onmouseout=function(){AutoPlay_1()} AutoPlay_1(); } //产品展示滚动图片结束 //-- /script style type="text/css" !-- BODY { BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; FONT-SIZE: 12px; BORDER-BOTTOM-WIDTH: 0px; MARGIN: 0px; FONT-FAMILY: 宋体; BACKGROUND-COLOR: #fff; BORDER-RIGHT-WIDTH: 0px } .blk_18 { BORDER-RIGHT: #e3e3e3 1px solid; BORDER-TOP: #e3e3e3 1px solid; MARGIN-TOP: 8px; FONT-SIZE: 12px; BACKGROUND: #f3f3f3; OVERFLOW: hidden; BORDER-LEFT: #e3e3e3 1px solid; WIDTH: 390px; BORDER-BOTTOM: #e3e3e3 1px solid; ZOOM: 1 } .blk_18 .pcont { FLOAT: left; OVERFLOW: hidden; WIDTH: 350px } .blk_18 .ScrCont { WIDTH: 32766px; ZOOM: 1 } .blk_18 #List1_1 { FLOAT: left } .blk_18 #List2_1 { FLOAT: left } .blk_18 .LeftBotton { BACKGROUND: url( ) no-repeat; FLOAT: left; MARGIN: 10px 1px; WIDTH: 15px; HEIGHT: 72px } .blk_18 .RightBotton { BACKGROUND: url( ) no-repeat; FLOAT: left; MARGIN: 10px 1px; WIDTH: 15px; HEIGHT: 72px } .blk_18 .LeftBotton { BACKGROUND-POSITION: 0px 0px; MARGIN-LEFT: 5px } .blk_18 .RightBotton { BACKGROUND-POSITION: 0px -100px; MARGIN-LEFT: -1px } .blk_18 .LeftBotton:hover { BACKGROUND-POSITION: -20px 0px } .blk_18 .RightBotton:hover { BACKGROUND-POSITION: -20px -100px } .blk_18 .pl IMG { DISPLAY: block; MARGIN: 6px auto 1px; CURSOR: pointer; BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none } .blk_18 .pl { BORDER-RIGHT: #f3f3f3 1px solid; BORDER-TOP: #f3f3f3 1px solid; FLOAT: left; BORDER-LEFT: #f3f3f3 1px solid; WIDTH: 114px; LINE-HEIGHT: 24px; BORDER-BOTTOM: #f3f3f3 1px solid; TEXT-ALIGN: center; TEXT-DECORATION: underline } .blk_18 A.pl:hover { BORDER-RIGHT: #ff9900 1px solid; BORDER-TOP: #ff9900 1px solid; BACKGROUND: #fff; BORDER-LEFT: #ff9900 1px solid; COLOR: #ff9900; BORDER-BOTTOM: #ff9900 1px solid } .commu_cont3 { MARGIN: 9px 7px 7px; LINE-HEIGHT: 150% } .commu_cont3 UL { WIDTH: 188px } -- /style /head body !-- picrotate_left start -- DIV class=blk_18A onmouseup=ISL_StopUp_1() class=LeftBotton onmousedown=ISL_GoUp_1() onmouseout=ISL_StopUp_1() href="javascript:void(0);" target=_self/A DIV class=pcont id=ISL_Cont_1 DIV class=ScrCont DIV id=List1_1!-- piclist begin --A class=pl href=" " target=_blankIMG height=72 alt=20-50元夏装抢疯 src=" " width=96美女小凡最新夏装/AA class=pl href=" " target=_blankIMG height=72 alt=韩国人气小耳环 src=" " width=96韩国人气小耳环/AA class=pl href=" " target=_blankIMG height=72 alt=3万6超值装修88平 src=" " width=963万6超值装修88平/AA class=pl href=" " target=_blankIMG height=72 alt=牛干巴敲开财富门 src=" " width=96牛干巴敲开财富门/AA class=pl href=" " target=_blankIMG height=72 alt=4K至7K高性能本本 src=" " width=964K至7K高性能本本/AA class=pl href=" " target=_blankIMG height=72 alt=7万装修102平婚房 src=" " width=967万装修102平婚房/AA class=pl href=" " target=_blankIMG height=72 alt=最新小车节油为主 src=" " width=96最新小车节油为主/AA class=pl href=" " target=_blankIMG height=72 alt="热门项目 BT烤翅" src=" " width=96热门项目 BT烤翅/AA class=pl href=" " target=_blankIMG height=72 alt=流行T恤+裤装 src=" " width=96要显瘦就这么穿！/A !-- piclist end --/DIV DIV id=List2_1/DIV/DIV/DIVA onmouseup=ISL_StopDown_1() class=RightBotton onmousedown=ISL_GoDown_1() onmouseout=ISL_StopDown_1() href="javascript:void(0);" target=_self/A/DIV SCRIPT type=text/javascript !-- picrun_ini() //-- /SCRIPT !-- picrotate_left end -- /body /html
