| <!doctype html> |
| <html lang="en"> |
| <head> |
| <meta charset="UTF-8"> |
| <meta name="Generator" content="EditPlus"> |
| <meta name="Author" content=""> |
| <meta name="Keywords" content=""> |
| <meta name="Description" content=""> |
| <title>Document</title> |
| </head> |
| <style type="text/css"> |
| #div1{ |
| width: 45px; height: 45px; |
| background-color: #4D4D4D; |
| position: absolute; cursor: pointer; |
| -webkit-box-shadow: 3px 3px 0px 3px #C7C7C7; |
| box-shadow: 3px 3px 3px 0px #C7C7C7; |
| } |
| #parent{ |
| width: 500px; height: 500px; |
| border: 1px solid #CDCDCD; |
| position: relative; margin: 0 auto; //父级元素设置为： |
| background-color: #F4F4F4; |
| } |
| .postText{ |
| width: 500px; height: 30px;margin: 0 auto; background-color: #F4F4F4; |
| } |
| .postText span{ |
| padding:0px 10px; |
| } |
| </style> |
| <body> |
| <div id="parent"> |
| <div id="div1" onmousemove="posMove(this.id)"></div> |
| </div> |
|
|
| <div class="postText"> |
| 移动的距离Top：<span id="posTop"></span>Left:<span id="posLeft"></span> |
| </div> |
|
|
| <script type="text/javascript"> |
| function posMove(getdivid) { |
| var oDiv = document.getElementById(getdivid); |
| var oParent = document.getElementById('parent'); |
| var sent = { |
| l: 10, //设置div在父元素的活动范围，10相当于给父div设置padding-left：10; |
| r: oParent.offsetWidth - oDiv.offsetWidth, // offsetWidth:当前对象的宽度， offsetWidth = width+padding+border |
| t: 10, |
| b: oParent.offsetHeight - oDiv.offsetHeight, |
| n: 10 |
| } |
| drag(oDiv, sent); |
| } |
|
|
| /** |
| * |
| * @param obj:被拖动的div |
| * @param sent :设置div在容器中可以被拖动的区域 |
| */ |
| function drag(obj,sent){ |
|
|
| var dmW = document.documentElement.clientWidth || document.body.clientWidth; |
| var dmH = document.documentElement.clientHeight || document.body.clientHeight; |
|
|
| var sent = sent || {}; |
| var l = sent.l || 0; |
| var r = sent.r || dmW - obj.offsetWidth; |
| var t = sent.t || 0; |
| var b = sent.b || dmH - obj.offsetHeight; |
| var n = sent.n || 10; |
|
|
| obj. = function (ev){ |
| var oEvent = ev || event; |
| var sentX = oEvent.clientX - obj.offsetLeft; |
| var sentY = oEvent.clientY - obj.offsetTop; |
|
|
| document. = function (ev){ |
| var oEvent = ev || event; |
|
|
| var slideLeft = oEvent.clientX - sentX; |
| var slideTop = oEvent.clientY - sentY; |
|
|
| if(slideLeft <= l){ |
| slideLeft = l; |
| } |
| if(slideLeft >= r){ |
| slideLeft = r; |
| } |
| if(slideTop <= t){ |
| slideTop = t; |
| } |
| if(slideTop >= b){ |
| slideTop = b; |
| } |
|
|
| obj.style.left = slideLeft + 'px'; |
| obj.style.top = slideTop + 'px'; |
|
|
| document.getElementById('posTop').innerHTML = slideTop; |
| document.getElementById('posLeft').innerHTML = slideLeft; |
|
|
| }; |
| document. = function (){ |
| document. = null; |
| document. = null; |
| } |
|
|
| return false; |
| } |
| } |
| </script> |
| </body> |
| </html> |
|
|