function changePicture(id,pic)
    {
    	var obj = document.getElementById(id);
		obj.src = "/templates/images/"+pic;
	}

function getid(obj)
	{
		return document.getElementById(obj);
	}

	function getNames(obj,name,tij)
	{	
		var p = getid(obj);
		var plist = p.getElementsByTagName(tij);
		var rlist = new Array();
		for(i=0;i<plist.length;i++)
		{
			if(plist[i].getAttribute("name") == name)
			{
				rlist[rlist.length] = plist[i];
			}
		}
		return rlist;
	}

	function ri(obj)
	{
		var p = obj.parentNode.parentNode.getElementsByTagName("img");
		for(i=0;i<p.length;i++)
		{
			if(obj == p[i])
			{
				return i;
			}
		}
	}

	function fiterplay(obj,num,t,name)
	{
		var fitlist = getNames(obj,name,t);
		for(i=0;i<fitlist.length;i++)
		{

			if(i == num)
			{
				fitlist[i].className = "dis";
			}
			else
			{
				fitlist[i].className = "undis";
			}
		}
	}

	function ci(obj)
	{
		var p = obj.parentNode.parentNode.getElementsByTagName("img");
		for(i=0;i<p.length;i++)
		{
			if(obj ==p[i])
			{
				p[i].className = "s";
			}
			else
			{
				p[i].className = "";
			}
		}
	}

	function play(obj,n1,n2)
	{
		var p = obj.parentNode.parentNode.getElementsByTagName("img");
		var bimg = getid(n1);
		var num = ri(obj);
		try
		{
			with(bimg)
			{
				filters[0].Apply();
				ci(obj);
				fiterplay(n1,num,"div","f");
				fiterplay(n2,num,"table","f");
				filters[0].play();
			}
		}
		catch(e)
		{
				ci(obj);
				fiterplay(n1,num,"div","f");
				fiterplay(n2,num,"table","f");
		}
	}
var n=0;
function clearAuto() {clearInterval(autoStart);};
function setAuto(){autoStart=setInterval("auto(n)", 3000)}
function auto()
{
	var x = getid("simg").getElementsByTagName("img");
	n++;
	if(n>3)n=0;
	play(x[n],"bimg","imginfo");
} 

 setAuto();


var temp = "tab1";
  function changeTab(n,m){
      var tabid = "tab"+n;
      var clearid="tab"+m;
     var picture;
     
      if(temp != tabid){
        clearDislay(temp);
        temp =tabid;
        if(n==1){
       document.getElementById('two').src="/templates/images/"+"外教社其他资源预览1.gif";
        }
else{
 document.getElementById('one').src="/templates/images/"+"SBS教材预览1.gif";
}
    }


      document.getElementById(tabid).style.display="block";
      
  };
  function clearDislay(tab){
      var clearTabid = tab;
      document.getElementById(clearTabid).style.display = "none";
  }