<html>
<head>
<title>能够自由拖动布局区域的网页</title>
<style type="text/css">
<!--
body{
font-size:12px;
font-family:Arial, Helvetica, sans-serif;
margin:0px; padding:0px;
/*background-color:#ffffd5;*/
background-color:#e6ffda;
}
.dragTable{
font-size:12px;
/*border:1px solid #003a82;*/
border:1px solid #206100;
margin-bottom:5px;
width:100%;
/*background-color:#cfe5ff;*/
background-color:#c9ffaf;
}
td{
padding:3px 2px 3px 2px;
vertical-align:top;
}
.dragTR{
cursor:move;
/*color:#FFFFFF;
background-color:#0073ff;*/
color:#ffff00;
background-color:#3cb500;
height:20px;
font-weight:bold;
font-size:14px;
font-family:Arial, Helvetica, sans-serif;
}
#parentTable{
border-collapse:collapse;
}
-->
</style>
<script language="javascript" defer="defer">
var Drag={
dragged:false,
ao:null,
tdiv:null,
dragStart:function(){
Drag.ao=event.srcElement;
if((Drag.ao.tagName=="TD")||(Drag.ao.tagName=="TR")){
Drag.ao=Drag.ao.offsetParent;
Drag.ao.style.zIndex=100;
}else
return;
Drag.dragged=true;
Drag.tdiv=document.createElement("div");
Drag.tdiv.innerHTML=Drag.ao.outerHTML;
Drag.ao.style.border="1px dashed red";
Drag.tdiv.style.display="block";
Drag.tdiv.style.position="absolute";
Drag.tdiv.style.filter="alpha(opacity=70)";
Drag.tdiv.style.cursor="move";
Drag.tdiv.style.border="1px solid #000000";
Drag.tdiv.style.width=Drag.ao.offsetWidth;
Drag.tdiv.style.height=Drag.ao.offsetHeight;
Drag.tdiv.style.top=Drag.getInfo(Drag.ao).top;
Drag.tdiv.style.left=Drag.getInfo(Drag.ao).left;
document.body.appendChild(Drag.tdiv);
Drag.lastX=event.clientX;
Drag.lastY=event.clientY;
Drag.lastLeft=Drag.tdiv.style.left;
Drag.lastTop=Drag.tdiv.style.top;
},
draging:function(){//判断MOUSE的位置
if(!Drag.dragged||Drag.ao==null)return;
var tX=event.clientX;
var tY=event.clientY;
Drag.tdiv.style.left=parseInt(Drag.lastLeft)+tX-Drag.lastX;
Drag.tdiv.style.top=parseInt(Drag.lastTop)+tY-Drag.lastY;
for(var i=0;i<parentTable.cells.length;i++){
var parentCell=Drag.getInfo(parentTable.cells[i]);
if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
var subTables=parentTable.cells[i].getElementsByTagName("table");
if(subTables.length==0){
if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
parentTable.cells[i].appendChild(Drag.ao);
}
break;
}
for(var j=0;j<subTables.length;j++){
var subTable=Drag.getInfo(subTables[j]);
if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){
parentTable.cells[i].insertBefore(Drag.ao,subTables[j]);
break;
}else{
parentTable.cells[i].appendChild(Drag.ao);
}
}
}
}
},
dragEnd:function(){
if(!Drag.dragged)
return;
Drag.dragged=false;
Drag.mm=Drag.repos(150,15);
Drag.ao.style.borderWidth="0px";
//Drag.ao.style.border="1px solid #003a82";
Drag.ao.style.border="1px solid #206100";
Drag.tdiv.style.borderWidth="0px";
Drag.ao.style.zIndex=1;
},
getInfo:function(o){//取得坐标
var to=new Object();
to.left=to.right=to.top=to.bottom=0;
var twidth=o.offsetWidth;
var theight=o.offsetHeight;
while(o!=document.body){
to.left+=o.offsetLeft;
to.top+=o.offsetTop;
o=o.offsetParent;
}
to.right=to.left+twidth;
to.bottom=to.top+theight;
return to;
},
repos:function(aa,ab){
var f=Drag.tdiv.filters.alpha.opacity;
var tl=parseInt(Drag.getInfo(Drag.tdiv).left);
var tt=parseInt(Drag.getInfo(Drag.tdiv).top);
var kl=(tl-Drag.getInfo(Drag.ao).left)/ab;
var kt=(tt-Drag.getInfo(Drag.ao).top)/ab;
var kf=f/ab;
return setInterval(function(){
if(ab<1){
clearInterval(Drag.mm);
Drag.tdiv.removeNode(true);
Drag.ao=null;
return;
}
ab--;
tl-=kl;
tt-=kt;
f-=kf;
Drag.tdiv.style.left=parseInt(tl)+"px";
Drag.tdiv.style.top=parseInt(tt)+"px";
Drag.tdiv.filters.alpha.opacity=f;
}
,aa/ab)
},
inint:function(){
for(var i=0;i<parentTable.cells.length;i++){
var subTables=parentTable.cells[i].getElementsByTagName("table");
for(var j=0;j<subTables.length;j++){
if(subTables[j].className!="dragTable")
break;
subTables[j].rows[0].className="dragTR";
subTables[j].rows[0].attachEvent("onmousedown",Drag.dragStart);
}
}
document.onmousemove=Drag.draging;
document.onmouseup=Drag.dragEnd;
}
}
Drag.inint();
</script>
</head>
<body>
<table cellspacing="4" width="100%" id="parentTable">
<tr>
<td width="25%" valgin="top">
<table class="dragTable" cellspacing="0">
<tr><td>CSS</td></tr>
<tr><td>CSS(Cascading Style Sheet),中文译为层叠样式表,是用于控制网页样式并允许将样式信息与网页内容分离的一种标记性语言。CSS是1996年由W3C审核通过,并且推荐使用的。</td><tr>
</table>
<table class="dragTable" cellspacing="0">
<tr><td>AJAX</td></tr>
<tr><td>Ajax(Asynchronous JavaScript and XML,异步JavaScript和XML)是目前很新的一项网络应用技术。</td><tr>
</table>
</td>
<td width="25%">
<table class="dragTable" cellspacing="0">
<tr><td>Javascript</td></tr>
<tr><td>Javascript是一种基于对象的脚本语言,使用它可以开发Internet客户端的应用程序。Javascript在HTML页面中以语句的方式出现,并且执行相应的操作。</td><tr>
</table>
</td>
<td width="25%">
<table class="dragTable" cellspacing="0">
<tr><td>XML</td></tr>
<tr><td>XML是eXtensible Markup Language的缩写,即可扩展标记语言。它是一种可以用来创建自定义标记的语言,由万维网协会(W3C)创建,用来克服HTML的局限。</td><tr>
</table>
<table class="dragTable" cellspacing="0">
<tr><td>网页变幻</td></tr>
<tr><td>保持页面的HTML不变,通过分别调用三个外部CSS文件,实现三个完全不同的页面效果,蓝色经典、清明上河图、交河古城。</td><tr>
</table>
</td>
</tr>
</table>
</body>
</html>