js兑现简单的table拖动功能
通过js实现简单的table拖动功能，目前拖动的cell设置为td层，可扩展。
附件中table.html是朋友传给我的，原作者不详，在此对他表示感谢，我这里应该叫扩展，标题有点大了，drag table demo.html是我修改之后的一个小例子，传上来主要是供本人学习借鉴。
本想查下jQuery的，好像没有找到单元格可以拖动的，看这个比较简单，就没有仔细研究jQuery的插件了，直接改这个了。
<html>
<style>
body{
font-size:9pt;
}
table,th,td{
font-size:9pt;
}
.lsitTalbe{
table-layout:fixed;
width:30%;
border-collapse:collapse;
border-color:#507010;
color:#003300;
}
.pageda{
font-family:Webdings;
font-size:12pt;
color:#CCCCCC;
cursor:default;
}
.pageua{
font-family:Webdings;
font-size:12pt;
}
.even{
background:#e8f8d0;
}
.odd{
background:#f8fcf0;
}
.header{
background:a0dc40;
color:003300;
}
</style>
<head>
<TITLE>Drag Table Demo</TITLE>
</head>
<body>
<table>
<tr>
<td>
<table class="lsitTalbe" align="center" border="1" cellspacing="1" cellpadding="1" onmousedown="mousedown()" onmouseup="mouseup()" onmousemove="mousemove()" >
<tr class="header">
<th width="10%">列1</th>
<th width="10%">列2</th>
<th width="40%">列3</th>
<th width="40%">列4</th>
<tr>
<tr class="even" id="tr_1">
<TD style="cursor:move" title="按住可拖动">1</TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=chkTaskItem_3 type=checkbox value=3 name=chkTaskItem></TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=txtTaskName_3 type=txtTaskName size=10 name=txtTaskName value="test1"></TD>
<TD style="cursor:move" title="按住可拖动">test1</TD>
</tr>
<tr class="odd" id="tr_2">
<TD style="cursor:move" title="按住可拖动">2</TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=chkTaskItem4 type=checkbox value=4 name=chkTaskItem></TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=txtTaskName_4 type=txtTaskName size=10 name=txtTaskName value="test2"></TD>
<TD style="cursor:move" title="按住可拖动">test2</TD>
</tr>
<tr class="even" id="tr_3">
<TD style="cursor:move" title="按住可拖动">3</TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=chkTaskItem_5 type=checkbox value=5 name=chkTaskItem></TD>
<TD style="cursor:move" title="按住可拖动"><INPUT class=inputStyle id=txtTaskName_5 type=txtTaskName size=10 name=txtTaskName value="test3"></TD>
<TD style="cursor:move" title="按住可拖动">test3</TD>
</tr>
</table>
<td>
</tr>
</table>
</body>
</html>
<script language="javaScript">
//源对象
var srcRowIndex;
//目标对象
var targetRowIndex;
var bDragMode ;
//Drag对象
var objDragItem ;
//触发事件的变量
var el;
function window.onload(){
initAdditionalElements();
}
function initAdditionalElements(){
objDragItem = document.createElement("DIV");
with(objDragItem.style){
backgroundColor = "buttonshadow";
cursor = "default";
position = "absolute";
filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=50)";
zIndex = 3001;
display ="none";
}
//再次承认js很强大，本人好自卑啊，总是要查文档，将刚创建的objDragItem对象加到body后
window.document.body.insertAdjacentElement("afterBegin", objDragItem);
}
function mousedown(){
el = window.event.srcElement;
if(el==null||el.tagName!="TD") return false;
//alert(el.innerHTML);
if( el.parentNode.rowIndex<2) return false;
//srcRowIndex = el.parentElement;
srcRowIndex = el;
bDragMode = true ;
if (objDragItem!=null){
with(objDragItem){
innerHTML = el.innerHTML;
style.height = el.offsetHeight;
style.width = el.offsetWidth;
}
}
el.setCapture();
}
function mouseup(){
if(el==null ||el.tagName !="TD" || el.parentNode.rowIndex<2) {
alert("不能拖动到非TD元素");
objDragItem.style.display ="none";
bDragMode = false ;
return false;
}
if(srcRowIndex == el) {
alert("不能拖动到自身");
objDragItem.style.display ="none";
bDragMode = false ;
return false;
}
//targetRowIndex = el.parentElement;
targetRowIndex = el;
srcRowIndex.swapNode(targetRowIndex);
bDragMode = false ;
objDragItem.style.display ="none";
}
function mousemove(){
el = window.event.srcElement;
if(el==null||el.tagName!="TD") return false;
//alert(el.tagName);
//取消事件冒泡
window.event.cancelBubble = false;
//left
cliX = window.event.clientX;
//top
cliY = window.event.clientY;
if(bDragMode && objDragItem!=null){
with(objDragItem){
style.display ="";
style.posLeft = cliX +1;
style.posTop = cliY - offsetHeight/2;
}
}
}
</script>