mozilla怎么才能模拟ie的setCapture

使用ie的setCapture方法之后，这个方法可以把一个对象“牢牢抓住”。我一直再找非ie情况下的替代方法但是一直都没找到。所以，请大家指点一下了。我先给出一段代码：   这段代码如果运行在ie下，当你用鼠标点击那个蓝色的div时，你不松鼠标，可以把它拖拽到ie浏览器外的地方。   如果这段代码运行在ff下，鼠标离开浏览器时，div就脱离了控制了。代码如下：   <body style="width:100%;height:100%;">
<div id="boat" style="position:absolute;background-color:#003366;width:200px;height:200px;"></div>
</body>
<script>
if(document.all){
document.getElementById('boat').onclick=function(){
document.getElementById('boat').setCapture();
};
document.body.onmousemove=function(ep){
document.getElementById('boat').style.left=mouseCoords(ep).x+"px";
}
}else{
document.getElementById('boat').addEventListener("click",function(){
window.captureEvents(Event.Click);
},true);
document.body.addEventListener("mousemove",function(ep){
document.getElementById('boat').style.left=ep.clientX;
//alert(ep.clientX);
},true);
}
function mouseCoords(ev) {
    ev = ev || window.event;
    if (ev.pageX || ev.pageY) {
        return {
           x : ev.pageX,
           y : ev.pageY
       };
    }
    return {
        x : ev.clientX + document.body.scrollLeft - document.body.clientLeft,
        y : ev.clientY + document.body.scrollTop - document.body.clientTop
    };
}
</script>所以大家帮帮想想办法，怎么才能找到非ie下，牢牢抓住对象的方法，以解决我说的这个问题为准。如果能解决，再开贴加100分。

解决方案 »

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非IE就是addEventListener啊。你的代码在ff、Chrome里跟IE相同啊
Obj为dom对象
if(Obj.setCapture){
          Obj.setCapture();
      }else if(window.captureEvents){
          window.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);
      }
captureEvents已经过时了，安装mozilla的文档，现已经改成W3c的标准做法 addEventListener
帮你简单改了一下，可以在ff,ie下实现你要的效果
<body style="width:100%;height:100%;">
<div id="boat" style="position:absolute;background-color:#003366;width:200px;height:200px;"></div>
</body>
<script>
var o=document.getElementById('boat');function mousedown(){
if(o.setCapture){
   o.setCapture();
  }else if(window.captureEvents){
  window.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);
  }
}function move1(ev){
o.style.left=mouseCoords(ev).x+"px";
}
function mouseup(){
if(o.releaseCapture){
              o.releaseCapture();
       }else if(window.captureEvents){
              window.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);
      }}document.onmousedown=mousedown;
document.onmousemove=function(event){move1(event)}
document.onmouseup=mouseup;
function mouseCoords(ev) {
  ev = ev || window.event;
  if (ev.pageX || ev.pageY) {
  return {
  x : ev.pageX,
  y : ev.pageY
  };
  }
  return {
  x : ev.clientX + document.body.scrollLeft - document.body.clientLeft,
  y : ev.clientY + document.body.scrollTop - document.body.clientTop
  };
}
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>dragDiv.html</title>

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <style type="text/css">
        body {
            font-family:Verfana;
            font-size:11px;
            color:#333333;
        }
        #win {
            position:absolute;
            left:50px;
            top:50px;
            width:200px;
            height:150px;
            border:1px solid #000000;
            background:yellow;
        }
    </style>
    <script type="text/javascript">
        var win;
        var left = 50;
        var top = 50;
        var move = false;
        function init() {
            win = document.getElementById("win");
            win.onmousedown = startDrag;
            win.onmousemove = drag;
            win.onmouseup = stopDrag;
        }

        window.onload = init;

        function startDrag(event) {
            event = event || window.event;
            var x = event.pageX || event.x;
            var y = event.pageY || event.y;
            left = x - left;
            top = y - top;
            win.style.background = "red";
            move = true;
        }

        function drag(event) {
            if(move) {
                event = event || window.event;
                win.style.background = "blue";
                var x = event.pageX || event.x;
                var y = event.pageY || event.y;
                win.style.left = x - left + "px";
                win.style.top = y - top + "px";
                //captureEvents();
                //win.setCapture();
                if (!window.captureEvents) {
                    win.setCapture();
                } else {
                    captureEvents();
                    //window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
                }
            }
        }

        function stopDrag(event) {
            event = event || window.event;
            win.style.background="yellow";
            var x = event.pageX || event.x;
            var y = event.pageY || event.y;
            left = x - left;
            top = y - top;
            move = false;
            //routeEvent();
            //win.releaseCapture();
            if (!window.releaseEvents) {
                win.releaseCapture();
            } else {
                releaseEvents();
                //window.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);
            }
        }
    </script>
  </head>

<body>
    <div id="win">
    </div>
</body>
</html>
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/IBM_hoojo/archive/2010/07/02/5708697.aspx
FF没有setCapture()、releaseCapture()方法
解决方法：
IE:
obj.setCapture();
obj.releaseCapture();
FF:
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
window.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);
if (!window.captureEvents) {
       o.setCapture();
}else {
       window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
}
if (!window.captureEvents) {
       o.releaseCapture();
}else {
       window.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);
}
关键是这里
document.addEventListener("mousemove",function(ep){
你要用document来绑定
不是body
我是楼主，你的代码，运行后，鼠标如果跑的快了，div会跟不上，那么我先结贴了，你如果有异议，我们再商量。
TO:  IBM_hoojo
我是楼主，你的代码，运行后，鼠标如果跑的快了，div会跟不上，那么我先结贴了，你如果有异议，我们再商量。