js动态打开层及关闭层超酷特效

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>DOM_text01</title>
<style type="text/css">
body,span,div,td{font-size:12px;line-height:1.5em;color:#849BCA;}
#bodyL{
float:left;
width:84px;
margin-right:2px;
}
a.od{
width:80px;
height:25px;
line-height:25px;
text-align:center;
font-weight:bold;
border: 2px solid #849BCA;
display:block;
color:#547BC9;
float:left;
text-decoration:none;
margin-top:2px;
}
a.od:link{
background:#EEF1F8;
}
a.od:visited{
background:#EEF1F8;
}
a.od:hover{
background:#EEE;
}
a.od:active{
background:#EEE;
}
#fd{
width:500px;
height:200px;
background:#EDF1F8;
border: 2px solid #849BCA;
margin-top:2px;
margin-left:2px;
float:left;
overflow:hidden;
position:absolute;
left:0px;
top:0px;
cursor:move;
float:left;
/*filter:alpha(opacity=50);*/

}
.content{
padding:10px;
}
</style>
</head>
<body>
<div id="bodyL">
<a href="#" class="od" onclick = "show(‘fd’);return false;">
[打开层]
</a>
<a href="#" class="od" onclick = "closeed(‘fd’);return false;">
[关闭层]
</a>
</div>
<div id="fd" style="display:none;filter:alpha(opacity=100);opacity:1;">
<div class="content">移动层</div>
</div>

<script type="text/javascript">
var prox;
var proy;
var proxc;
var proyc;
function show(id){/*–打开–*/
clearInterval(prox);
clearInterval(proy);
clearInterval(proxc);
clearInterval(proyc);
var o = document.getElementById(id);
o.style.display = "block";
o.style.width = "1px";
o.style.height = "1px";
prox = setInterval(function(){openx(o,500)},10);
}
function openx(o,x){/*–打开x–*/
var cx = parseInt(o.style.width);
if(cx < x)
{
   o.style.width = (cx + Math.ceil((x-cx)/5)) +"px";
}
else
{
   clearInterval(prox);
   proy = setInterval(function(){openy(o,200)},10);
}
}
function openy(o,y){/*–打开y–*/
var cy = parseInt(o.style.height);
if(cy < y)
{
   o.style.height = (cy + Math.ceil((y-cy)/5)) +"px";
}
else
{
   clearInterval(proy);  
}
}
function closeed(id){/*–关闭–*/
clearInterval(prox);
clearInterval(proy);
clearInterval(proxc);
clearInterval(proyc);
var o = document.getElementById(id);
if(o.style.display == "block")
{
   proyc = setInterval(function(){closey(o)},10);  
}
}
function closey(o){/*–打开y–*/
var cy = parseInt(o.style.height);
if(cy > 0)
{
   o.style.height = (cy – Math.ceil(cy/5)) +"px";
}
else
{
   clearInterval(proyc);   
   proxc = setInterval(function(){closex(o)},10);
}
}
function closex(o){/*–打开x–*/
var cx = parseInt(o.style.width);
if(cx > 0)
{
   o.style.width = (cx – Math.ceil(cx/5)) +"px";
}
else
{
   clearInterval(proxc);
   o.style.display = "none";
}
}

/*————————-鼠标拖动———————*/
var od = document.getElementById("fd");
var dx,dy,mx,my,mouseD;
var odrag;
var isIE = document.all ? true : false;
document.onmousedown = function(e){
var e = e ? e : event;
if(e.button == (document.all ? 1 : 0))
{
   mouseD = true;  
}
}
document.onmouseup = function(){
mouseD = false;
odrag = "";
if(isIE)
{
   od.releaseCapture();
   od.filters.alpha.opacity = 100;
}
else
{
   window.releaseEvents(od.MOUSEMOVE);
   od.style.opacity = 1;
}
}

//function readyMove(e){
od.onmousedown = function(e){
odrag = this;
var e = e ? e : event;
if(e.button == (document.all ? 1 : 0))
{
   mx = e.clientX;
   my = e.clientY;
   od.style.left = od.offsetLeft + "px";
   od.style.top = od.offsetTop + "px";
   if(isIE)
   {
    od.setCapture();   
    od.filters.alpha.opacity = 50;
   }
   else
   {
    window.captureEvents(Event.MOUSEMOVE);
    od.style.opacity = 0.5;
   }
   //alert(mx);
   //alert(my);
}
}
document.onmousemove = function(e){
var e = e ? e : event;

//alert(mrx);
//alert(e.button);
if(mouseD==true && odrag)
{
   var mrx = e.clientX – mx;
   var mry = e.clientY – my;
   od.style.left = parseInt(od.style.left) +mrx + "px";
   od.style.top = parseInt(od.style.top) + mry + "px";  
   mx = e.clientX;
   my = e.clientY;
}
}

</script>
</body>
</html>

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