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| <!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; //父級元素設置為： | |
| 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"> | |
| 移動的距離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, //設置div在父元素的活動范圍，10相當于給父div設置padding-left：10; | |
| r: oParent.offsetWidth - oDiv.offsetWidth, // offsetWidth:當前對象的寬度， offsetWidth = width+padding+border | |
| t: 10, | |
| b: oParent.offsetHeight - oDiv.offsetHeight, | |
| n: 10 | |
| } | |
| drag(oDiv, sent); | |
| } | |
| /** | |
| * | |
| * @param obj:被拖動的div | |
| * @param sent :設置div在容器中可以被拖動的區域 | |
| */ | |
| 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> | |
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