js漸變彈出視窗和關閉視窗效果

antzone發表於2017-04-06
JS

本章節分享一段程式碼例項，它實現了漸變彈出視窗和關閉視窗的效果。

裡面涉及到不少的常用知識，比如事件註冊，還有動態設定元素的樣式，比如尺寸和透明度等。

程式碼如下:

[HTML] 純文字檢視 複製程式碼
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.51texiao.cn/" />
<title>螞蟻部落</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;
}
.content{
  padding:10px;
}
</style>
</head>
<body>
<div id="bodyL"> 
  <a href="#" class="od"> [開啟層] </a> 
  <a href="#" class="od"> [關閉層] </a> 
</div>
<div id="fd" style="display:none;filter:alpha(opacity=100);opacity:1;">
  <div class="content">移動層</div>
</div>
<script type="text/javascript">
var prox;
var proy;
var proxc;
var proyc;
function show(id){/*--開啟--*/
  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){/*--開啟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){/*--開啟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){/*--關閉--*/
  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){/*--開啟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){/*--開啟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";
  }
}
/*滑鼠拖動*/
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;
    }
  }
}
document.onmousemove = function(e){
  var e = e ? e : event;
  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><br/>
<div>softwhy.com/</div>
</body>
</html>

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