网站上面有这种切换效果_Javascript教程-查字典教程网

网站上面有这种切换效果

摘要：新闻切换技术varnn;nn=1;setTimeout('change_img()',6000);functionchange_img(){...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>新闻切换技术</title>

<!--

body { text-align: center; margin:0; padding:0; background: #FFF; font-size:12px; color:#000;}

div,form,img,ul,ol,li,dl,dt,dd {margin: 0; padding: 0; border: 0;}

h1,h2,h3,h4,h5,h6 { margin:0; padding:0;}

table,td,tr,th{font-size:12px;}

a:link {color: #000; text-decoration:none;}

a:visited {color: #83006f;text-decoration:none;}

a:hover {color: #c00; text-decoration:underline;}

a:active {color: #000;}

.focusPic{margin:0 auto; width:244px;}

.focusPic .pic{margin:0 auto; width:240px; height:180px; padding:2px 0 0;}

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.focusPic .adPic .text{float:right; padding:9px 4px 0 0; width:140px;}

.focusPic .adPic .text a{color:#1f3a87;}

.focusPic .adPic .text a:hover{color:#bc2931;}

.focusPic h2{ float:left; width:232px;padding:4px 0 3px 12px; font-size:14px; text-align:left;}

.focusPic p{float:left; width:226px;line-height:160%; margin:0; text-align:left;padding:0 0 10px 12px;}

.focusPic p img {margin:0px 0 2px;}

.focusPic .more{ margin:0 auto; width:240px; }

.focusPic .more .textNum{float:right; margin:0 8px 0 0;padding:0 0 4px;}

.focusPic .more .textNum .text{float:left; font-weight:bold; padding:7px 6px 0 0; color:#666;}

.focusPic .more .textNum .num{float:left; width:113px; height:19px;}

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.focusPic .more .textNum .bg2{ background:url(http://tech.163.com/newimg/num2.gif);}

.focusPic .more .textNum .bg3{ background:url(http://tech.163.com/newimg/num3.gif);}

.focusPic .more .textNum .bg4{ background:url(http://tech.163.com/newimg/num4.gif);}

.focusPic .more .textNum .num ul{ float:left; width:113px;}

.focusPic .more .textNum .num li{float:left; width:28px; font-weight:bold;display:block; color:#fff; list-style-type:none; padding:6px 0 0;}

.focusPic .more .textNum .num li a{color:#fff; padding:0 5px; }

.focusPic .more .textNum .num li a:visited{color:#fff;}

.focusPic .more .textNum .num li a:hover{color:#ff0;}

-->

</style>

</head>

<body>

var nn;

nn=1;

setTimeout('change_img()',6000);

function change_img()

{

if(nn>4) nn=1

setTimeout('setFocus1('+nn+')',6000);

nn++;

tt=setTimeout('change_img()',6000);

}

function setFocus1(i)

{

selectLayer1(i);

}

function selectLayer1(i)

{

switch(i)

{

case 1:

document.getElementById("focusPic1").style.display="block";

document.getElementById("focusPic2").style.display="none";

document.getElementById("focusPic3").style.display="none";

document.getElementById("focusPic4").style.display="none";

document.getElementById("focusPic1nav").style.display="block";

document.getElementById("focusPic2nav").style.display="none";

document.getElementById("focusPic3nav").style.display="none";

document.getElementById("focusPic4nav").style.display="none";

break;

case 2:

document.getElementById("focusPic1").style.display="none";

document.getElementById("focusPic2").style.display="block";

document.getElementById("focusPic3").style.display="none";

document.getElementById("focusPic4").style.display="none";

document.getElementById("focusPic1nav").style.display="none";

document.getElementById("focusPic2nav").style.display="block";

document.getElementById("focusPic3nav").style.display="none";

document.getElementById("focusPic4nav").style.display="none";

break;

case 3:

document.getElementById("focusPic1").style.display="none";

document.getElementById("focusPic2").style.display="none";

document.getElementById("focusPic3").style.display="block";

document.getElementById("focusPic4").style.display="none";

document.getElementById("focusPic1nav").style.display="none";

document.getElementById("focusPic2nav").style.display="none";

document.getElementById("focusPic3nav").style.display="block";

document.getElementById("focusPic4nav").style.display="none";

break;

case 4:

document.getElementById("focusPic1").style.display="none";

document.getElementById("focusPic2").style.display="none";

document.getElementById("focusPic3").style.display="none";

document.getElementById("focusPic4").style.display="block";

document.getElementById("focusPic1nav").style.display="none";

document.getElementById("focusPic2nav").style.display="none";

document.getElementById("focusPic3nav").style.display="none";

document.getElementById("focusPic4nav").style.display="block";

break;

}

</script>

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