function getid(obj)//ȡ��ӧid��Ԫ��
		  {
			return document.getelementbyid(obj);
		  }

	function getnames(obj,name,tij)//ȡobjԪ���±�ǩϊtij��Ԫ�ز�ҫ������name����=name;����һ������
	{	
		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)//ȡ�ö�ӧ��сͼ�б��е�ǰԪ�ض�ӧ�����
	{
		var p = getid("simg").getelementsbytagname("td");
		for(i=0;i<p.length;i++)
		{
			if(obj == p[i])
			{
				return i;
			}
		}
	}

	function ci(obj)//сͼѡ���ĵ������
	{
		var p = getid("simg").getelementsbytagname("td");
		for(i=0;i<p.length;i++)
		{
			if(obj ==p[i])
			{
				p[i].classname = "s";
			}
			else
			{
				p[i].classname = "";
			}
		}
	}
	function fiterplay(obj,num,t,name)//����ҳ���ĺ���.���ö�ӧ���ݵ����غ���ʾ obj:Ԫ�ص�id  name:Ԫ�ض�ӧ��name���ե�ֵ, t:��ӧ���ݵı�ǩ num:��ǰѡ���Ԫ�ص����
	{
		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 play(obj,n1,n2)//���ŵĺ���
	{
		var p = obj.parentnode.getelementsbytagname("td");
		var bimg = getid(n1);
		var infos = getid(n2);
		var num = ri(obj);
		try	//ie�µĵ������
		{
			with(bimg)
			{
				filters[0].apply();	//�����˾�
				ci(obj); //���сͼ��ѡ��.���է���try����.
				fiterplay(n1,num,"div","f");//�����˾��ж�ӧ���ֵ���ʾ������
				filters[0].play();	//�����˾�
				//alert(p[0].innerhtml)
			}
		with(infos)
			{
				filters[0].apply();	//�����˾�
				ci(obj); //���сͼ��ѡ��.���է���try����.
				fiterplay(n2,num,"div","f");//�����˾��ж�ӧ���ֵ���ʾ������
				filters[0].play();	//�����˾�
			}
		}
		catch(e)//ff�µĵ������
		{
				ci(obj);
				fiterplay(n1,num,"div","f");
				fiterplay(n2,num,"div","f");
		}
	}
var n=0;
function clearauto() {clearinterval(autostart);};
function setauto(){autostart=setinterval("auto(n)", 3000)}
function auto()
{
	var x = getid("simg").getelementsbytagname("td");
	n++;
	if(n>x.length-1)n=0;
	play(x[n],"bimg","infos");
} 

 setauto();