function drag(o){
	o.onmousedown=function(a){
		var d=document;if(!a)a=window.event;
		var x=a.layerX?a.layerX:a.offsetX,y=a.layerY?a.layerY:a.offsetY;
		if(o.setCapture)
			o.setCapture();
		else if(window.captureEvents)
			window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);

		d.onmousemove=function(a){
			if(!a)a=window.event;
			if(!a.pageX)a.pageX=a.clientX;
			if(!a.pageY)a.pageY=a.clientY;
			var tx=a.pageX-x,ty=a.pageY-y;
			o.style.left=tx;
			o.style.top=ty;
		};

		d.onmouseup=function(){
			if(o.releaseCapture)
				o.releaseCapture();
			else if(window.captureEvents)
				window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
			d.onmousemove=null;
			d.onmouseup=null;
		};
	};
}