<html>
<head><title>拖动效果函数演示 by Longbill.cn</title>
<style>
body
{
font-size:12px;
color:#333333;
border : 0px solid blue;
}
div
{
position : absolute;
background-color : #c3d9ff;
margin : 0px;
padding : 5px;
border : 0px;
width : 100px;
height:100px;
}
</style>
</head>
<body>
<script>
function drag(o,s)
{
if (typeof o == "string") o = document.getElementById(o);
o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
o.orig_index = o.style.zIndex;
o.onmousedown = function(a)
{
this.style.cursor = "move";
this.style.zIndex = 10000;
var d=document;
if(!a)a=window.event;
var x = a.clientX+d.body.scrollLeft-o.offsetLeft;
var y = a.clientY+d.body.scrollTop-o.offsetTop;
//author: www.longbill.cn
d.ondragstart = "return false;"
d.onselectstart = "return false;"
d.onselect = "document.selection.empty();"
if(o.setCapture)
o.setCapture();
else if(window.captureEvents)
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
d.onmousemove = function(a)
{
if(!a)a=window.event;
o.style.left = a.clientX+document.body.scrollLeft-x;
o.style.top = a.clientY+document.body.scrollTop-y;
o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
}
d.onmouseup = function()
{
if(o.releaseCapture)
o.releaseCapture();
else if(window.captureEvents)
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
d.onmousemove = null;
d.onmouseup = null;
d.ondragstart = null;
d.onselectstart = null;
d.onselect = null;
o.style.cursor = "normal";
o.style.zIndex = o.orig_index;
}
}
if (s)
{
var orig_scroll = window.onscroll?window.onscroll:function (){};
window.onscroll = function ()
{
orig_scroll();
o.style.left = o.orig_x + document.body.scrollLeft;
o.style.top = o.orig_y + document.body.scrollTop;
}
}
}
</script>
<div id="div1" style="left:10px;top:10px;">div1:我可以被拖动</div>
<div id="div2" style="left:120px;top:10px;background-color : #f3d9ff">div2:来拖我呀</div>
<div id="div3" style="left:230px;top:10px;background-color : #c3ffff">div3:我随便你拖</div>
<div id="div4" style="left:10px;top:120px;background-color : #c3d944">div4:我可以随窗口滑动，把我拖到最下面，然后滚动网页看看</div>
<div id="div5" style="left:120px;top:120px;background-color : #f3d944">作者: Longbill
<a href=http://www.longbill.cn target=_blank>www.longbill.cn</a>
</div>
<div id="div6" style="left:230px;top:120px;background-color : #e3f944;width:200px;">参数说明:
drag(obj [,scroll]);
obj:对象的id或对象本身;
scroll(可选):对象是否随窗口拖动而滑动，默认为否
鼠标右键查看源代码
</div>
<script>
drag("div1");
drag("div2");
drag("div3");
drag("div4",1);
drag("div5",1);
drag("div6",1);
</script>
</body>
</hrml>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="www.w3.org/1999/xhtml">
<head>
<title>JavaScript实现图片旋转构成3D圆环代码 - www.webdm.cn</title>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
<style type="text/css">
body{background:black;color:white;line-height:29px;}
span{border:1px solid gray;background:#333;padding:4px;font-weight:bold;}
</style>
<script language="javascript">
window.onload=function(){
var rt=new imgRound("imgContainer",120,90,300,80,230,0.01);
setInterval(function(){rt.roundMove()},20)
}
function imgRound(id,w,h,x,y,r,dv,rh,ah){
if (ah==undefined) ah=1;
if (rh==undefined) rh=10;
var dv=dv*ah; //旋转速度
var pi=3.1415926575;
var d=pi/2;
var pd=Math.asin(w/2/r);
var smove=true;
var imgArr=new Array();
var objectId=id;
var o=document.getElementById(objectId);
o.style.position="relative";
var arrimg=o.getElementsByTagName("img");
var pn=arrimg.length; //图片数量
var ed=pi*2/pn;
for (n=0;n<arrimg.length;n++){
var lk=arrimg[n].getAttribute("link");
if (lk!=null) arrimg[n].setAttribute("title",lk)
arrimg[n].onclick=function(){
if (this.getAttribute("link")!=null){
if (this.getAttribute("target")!="_blank") window.location=(this.getAttribute("link"))
else window.open(this.getAttribute("link"))
}
}
arrimg[n].onmouseout=function(){smove=true;}
arrimg[n].onmouseover=function(){smove=false;}
arrimg[n].style.position="absolute";
imgArr.push(arrimg[n]);
}
this.roundMove=function(){
for (n=0;n<=pn-1;n++){
var o=imgArr[n];
var ta=Math.sin(d+ed*n),strFilter;
if (ta<0) o.style.left=Math.cos(d+ed*n-pd)*r+x+"px";
else o.style.left=Math.cos(d+ed*n+pd)*r+x+"px";
o.style.top=ta*rh+rh+y+"px";
var zoom=Math.abs(Math.sin((d+ed*n)/2+pi/4))*0.5+0.5;
o.style.width=Math.abs(Math.cos(d+ed*n+pd)-Math.cos(d+ed*n-pd))*zoom*r+"px";
o.style.height=zoom*h+"px";
if (ta<0) {ta=(ta+1)*80+20;o.style.zIndex=0;}
else {ta=100;o.style.zIndex=1}
if (o.style.zIndex<=0) strFilter="FlipH(enabled:true)"
else strFilter="FlipH(enabled:false)";
strFilter=strFilter+" alpha(opacity="+ta+")";
o.style.opacity=ta/100;
o.style.filter=strFilter;
}
if (smove) d=d+dv;
}
}
</script>
</head>
<body>
<div id="imgContainer" style="width:600px;height:300px;border:1px solid red">
<img src="http://www.webdm.cn/images/wall1_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall2_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall3_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall4_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall5_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall1_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall2_s.jpg" link="/" target="_blank">
<img src="http://www.webdm.cn/images/wall3_s.jpg" link="/" target="_blank">
</div>
</body>
</html>
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