You can swap table rows on the client-side by swapping the cell contents of the
current rows and the row to swap. The following method takes three parameters:
the current table row element, a Boolean to indicate whether the row should move
up, and a Boolean to indicate whether the first row should be ignored.

function SwapRows(rowElem, dirUp, ignoreFirstRow) 
{
var rowElemToSwap = (dirUp) ? rowElem.previousSibling : rowElem.nextSibling;
// Firefox returns a blank text node for the sibling
while (rowElemToSwap && rowElemToSwap.nodeType != 1) 
{
rowElemToSwap = (dirUp) ? rowElemToSwap.previousSibling : rowElemToSwap.nextSibling;
}
if (rowElemToSwap && !(ignoreFirstRow && rowElemToSwap.rowIndex == 0)) 
{
var rowCells = rowElem.cells;
var colInner;
for (var i = 0, loopCnt = rowCells.length; i < loopCnt; i++) 
{
colInner = rowCells[i].innerHTML;
rowCells[i].innerHTML = rowElemToSwap.cells[i].innerHTML;
rowElemToSwap.cells[i].innerHTML = colInner;
}
}
}