js 表格拖拽效果实例代码 (IE only)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-type" content="text/html; charset=gb2312" /> 
<title>Table Test (I.E. Only)</title>

s += '<tr><th style=\"font-size:12px;text-align:center;font-weight:bold;line-height: 23px;' 
s += 'border: 1px solid #77ABF2;height: 25px;white-space: nowrap;background-color:#AEAEAE;">' 
s += obj.rows[0].cells[srcCellIndex].innerHTML + '</th></tr>';

for(var i = 1;i < obj.rows.length;i++) { 
s += '<tr><td>' + obj.rows[i].cells[srcCellIndex].innerHTML + '</td></tr>'; 
} 
return s; 
} 
/*得到表格*/ 
function getTable(obj) { 
while(obj.tagName.toLowerCase() != 'table') { 
obj = obj.parentElement; 
} 
return obj; 
}

/*交换列*/ 
function swapCol(srcCellIndex,destCellIndex,obj) { 
obj = typeof obj === 'string' ? document.getElementById(obj) : obj; 
for(var i = 0;i < obj.rows.length;i++) { 
obj.rows[i].cells[srcCellIndex].swapNode(obj.rows[i].cells[destCellIndex]); 
} 
}

function createDiv() { 
var div = document.createElement('div'); 
div.style.cssText += 'border:1px dashed #003F87;background:#FFFFFF;color:#DC8331;overflow:hidden;'; 
div.style.cssText += 'zIndex:10000;position:absolute;filter:Alpha(opacity=70);font-size:12px;'; 
return div; 
}

/*得到事件促发的th元素*/ 
function getThEl() { 
var el = document.elementFromPoint(event.x,event.y); 
if(el.tagName.toLowerCase() == 'th') { 
return el; 
} 
return; 
}

/*得到对象的位置*/ 
function getObjPos(obj) { 
var x = y = 0; 
if(obj.getBoundingClientRect) { 
var box = obj.getBoundingClientRect(); 
x = box.left + Math.max(document.documentElement.scrollLeft,document.body.scrollLeft) - document.documentElement.clientLeft; 
y = box.top + Math.max(document.documentElement.scrollTop,document.body.scrollTop) - document.documentElement.clientTop; 
} else { 
while(obj != document.body) { 
x += obj.offsetLeft; 
y += obj.offsetTop; 
obj = obj.offsetParent 
} 
} 
return { 'x': x,'y': y }; 
}

/*得到鼠标的位置*/ 
function getCurPos() { 
e = event || window.event; 
return e.pageX ? { x: e.pageX,y: e.pageY} : { x: e.clientX + document.documentElement.scrollLeft - 
document.documentElement.clientLeft,y: e.clientY + document.documentElement.scrollTop - 
document.documentElement.clientTop}; 
}

function startSwap() { 
var startEl = getThEl(); 
if(typeof startEl == 'undefined') 
return; 
var div = createDiv(); 
document.body.appendChild(div); 
div.style.width = startEl.clientWidth; 
div.style.height = getTable(startEl).clientHeight; 
div.innerHTML = '<table class=\"Shadow\">' + getCols(startEl.cellIndex,getTable(startEl)) + '</table>'; 
div.style.left = getObjPos(startEl).x + 'px'; 
div.style.top = getObjPos(startEl).y + 'px'; 
div.style.display = 'block';

var isDragable = true; 
var curX = getCurPos().x; 
var curY = getCurPos().y; 
var objX = getObjPos(div).x; 
var objY = getObjPos(div).y;

div.onmousemove = function() { 
if(isDragable) { 
div.style.cssText += 'cursor:move;'; 
div.style.left = getCurPos().x - curX + objX + 'px'; 
div.style.top = getCurPos().y - curY + objY + 'px'; 
} 
}

div.onmouseup = function() { 
isDragable = false; 
div.style.display = 'none'; 
var endEl = getThEl(); 
if(typeof endEl === 'undefined') { 
return; 
} 
var srcCellIndex = startEl.cellIndex; 
var destCellIndex = endEl.cellIndex; 
swapCol(srcCellIndex,destCellIndex,getTable(endEl)); 
} 
/*鼠标移除层，事件取消*/ 
div.onmouseout = function() { 
isDragable = false; 
div.style.display = 'none'; 
return; 
} 
}

</script>

</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]