// JavaScript Document
//*****拖动对象***/
function drag(o,s)
{
	if (typeof o == "string") o = document.getElementById(o);
	o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
	o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
	if(s!=0)
		o.orig_index = o.style.zIndex;
	o.onmousedown = function(a)
	{

	  this.style.cursor = "move";
	  if(s!=0)
	  	this.style.zIndex = zIndex;
	  var d=document;
	  if(!a)a=window.event;
	  var x = a.clientX+d.body.scrollLeft-o.offsetLeft;
	  var y = a.clientY+d.body.scrollTop-o.offsetTop;
	  d.ondragstart = "return false;"
	  d.onselectstart = "return false;"
	  d.onselect = "document.selection.empty();"
	  if(o.setCapture)
	   o.setCapture();
	  else if(window.captureEvents)
	   window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
	   
	  d.onmousemove = function(a)
	  {
	   if(!a)a=window.event;
	   o.style.left = a.clientX+document.body.scrollLeft-x;
	   o.style.top = a.clientY+document.body.scrollTop-y;
	   o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
	   o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
	  }
		
	  d.onmouseup = function()
	  {
	   if(o.releaseCapture)
		o.releaseCapture();
	   else if(window.captureEvents)
		window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
	   d.onmousemove = null;
	   d.onmouseup = null;
	   d.ondragstart = null;
	   d.onselectstart = null;
	   d.onselect = null;
	   o.style.cursor = "normal";
	   o.style.zIndex = o.orig_index;
	  }
	  
	}

	if (s)
	{
	  var orig_scroll = window.onscroll?window.onscroll:function (){};
	  window.onscroll = function ()
	  {
	   orig_scroll();
	   o.style.left = o.orig_x + document.body.scrollLeft;
	   o.style.top = o.orig_y + document.body.scrollTop;
	  }
	}

}