(function($) { 
		  $.fn.scrollBox = function(options){ 
		  var defaultOptions = { 
		  speed: 0.1, //加速 
		  time: 16, //移动速度 
		  top: 150, //默认顶部 
		  align: 'right', //浮动位置，可选左、右
		  mix: 0 //边距
	}; 
	var options = $.extend(defaultOptions, options); 
	this.each(function(){ 
	var obj = $(this); 
	init(); 
	function init(){ 
		obj.css('display', 'block'); 
		obj.css('position', 'absolute'); 
		obj.css(options.align, options.mix); 
		obj.css('top', options.top+'px'); 
		obj.css('z-index', '99'); 
		move(); 
	} 
	function back() { 
		acceleration = options.speed; 
		time = options.time; 
		var x1 = 0; 
		var y1 = 0; 
		var x2 = 0; 
		var y2 = 0; 
		if (document.documentElement) { 
			x1 = document.documentElement.scrollLeft || 0; 
			y1 = document.documentElement.scrollTop || 0; 
		} 
			if (document.body) { 
			x2 = document.body.scrollLeft || 0; 
			y2 = document.body.scrollTop || 0; 
		} 
		var x = Math.max(x1, x2); 
		var y = Math.max(y1, y2); 
		var speed = acceleration; 
		return { 
			l: x, 
			t: y, 
			s: speed 
		}; 
	}; 
	function move(){ 
		var tip = obj; 
		var old = options.top; 
		var pos = back().t; 
		pos = pos - $(tip).Coordinate().y + options.top; 
		pos = $(tip).Coordinate().y + pos / 10; 
		if (pos < options.top) { 
			pos = options.top; 
		} 
		if (pos != old) { 
			tip.css('top',pos + "px"); 
		} 
		old = pos; 
		window.setTimeout(function(){move();}, options.time); 
	}; 
	}); 
	}; 
	$.fn.Coordinate = function(){ 
		var E = $(this)[0]; 
		var C = E.offsetTop; 
		var B = E.offsetLeft; 
		var A = E.offsetWidth; 
		var D = E.offsetHeight; 
		while (E = E.offsetParent) { 
			C += E.offsetTop; 
			B += E.offsetLeft; 
		} 
		return { 
			x: B, 
			y: C, 
			w: A, 
			h: D 
		}; 
	}; 
})(jQuery); 
$(function(){
	$(".float_mx").scrollBox(); 
	$(".float_mx .close").click(function(){
		$(".float_mx").slideUp("fast");									 
	})
	$("#gdad").scrollBox({
		align: 'left' //浮动位置，可选左、右
	}); 
	$("#gdad .close").click(function(){
		$("#gdad").slideUp("fast");									 
	})	   
})