用鼠标拖动表格进行排序

<script language="javascript">
  var beginMoving=false;
function MouseDownToMove(obj){
 obj.style.zIndex=1;
 obj.mouseDownY=event.clientY;
 obj.mouseDownX=event.clientX;
 beginMoving=true;
 obj.setCapture();
}

function MouseMoveToMove(obj){
    if(!beginMoving) return false;
 obj.style.top = (event.clientY-obj.mouseDownY);
 obj.style.left = (event.clientX-obj.mouseDownX);
}
function MouseUpToMove(obj){
 if(!beginMoving) return false;
 obj.releaseCapture();
 obj.style.top=0;
 obj.style.left=0;
 obj.style.zIndex=0;
 beginMoving=false;
 var tempTop=event.clientY-obj.mouseDownY;
 var tempRowIndex=(tempTop-tempTop%25)/25;
 if(tempRowIndex+obj.rowIndex <0 )tempRowIndex=-1;
 else tempRowIndex=tempRowIndex+obj.rowIndex;
 if(tempRowIndex >= obj.parentElement.rows.length-1) tempRowIndex = obj.parentElement.rows.length-1;
 obj.parentElement.moveRow(obj.rowIndex,tempRowIndex);
}

</script>
用鼠标移动TR<br> 
  <TABLE WIDTH="300" BORDER="1" >
   
   <TR bgcolor=#ffffff style='height:25;position:relative;' ><TD>7</TD><TD>7</TD><TD>7</TD></TR>

   </script>
  </TABLE>