function initTest() { 
	document.all.today.style.posTop = -200; //设置onLoad事件激发以后，层相对于固定后的y方向位置 
	document.all.today.style.visibility = 'visible'//设置层为可见 
	MoveLayer('today');//调用函数MoveLayer() 
} 
function MoveLayer(layerName) { 
	var x = 35;//浮动层固定于浏览器的x方向位置 
	var y = 310;//浮动层固定于浏览器的y方向位置 
	var diff = (document.body.scrollTop + y - document.all.today.style.posTop)*.40; 
	var y = document.body.scrollTop + y - diff; 
	eval("document.all." + layerName + ".style.posTop = y"); 
	eval("document.all." + layerName + ".style.posLeft = x");//移动层 
	setTimeout("MoveLayer('today');", 30);//设置20毫秒后再调用函数MoveLayer() 
} 

function SwapImg(obj,action)
	{
		switch(action)
		{
			case 0:
				SwapPlay(obj);
				break;
			case 1:
				SwapSound(obj);
				break;
		}
	}



function SwapPlay(obj)
	{
		var pobj = document.getElementById("Play");
		if(obj.src.indexOf("pause.gif") == -1)
		{
			obj.src = "image/pause.gif";
			obj.alt = "暂停";
			pobj.play();
		}
		else
		{
			obj.src = "image/play.gif";
			obj.alt = "播放";
			pobj.pause();
		}
	}
function SwapSound(obj)
	{
		var pobj = document.getElementById("Play");
		
		if(obj.src.indexOf("audio.gif") == -1)
		{
			obj.src = "image/audio.gif";
			pobj.mute = false;
		}
		else
		{
			obj.src = "image/audio2.gif";
			pobj.mute = true;
		}
	}