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;
		o.orig_index = o.style.zIndex;
  
		o.onmousedown = function(a)
		{
		 	this.style.cursor = "pointer";
  			this.style.zIndex = 10000;
  			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;
  //author: www.longbill.cn
  			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;
  			}
		}
	}