function show_ddz(num)
{
	for (var i=1;i<= 2;i++)
	{
		if (num==i)
		{
			document.getElementById("ddz_"+i).style.background="url(index/images/sy_middle_news_an01.gif) no-repeat center";
			document.getElementById("ddz_"+i).style.color="#fff";
			document.getElementById("ddz_c_"+i).style.display="block";
		}
		else
		{
			document.getElementById("ddz_"+i).style.background="url(index/images/sy_middle_news_an04.gif) no-repeat center";
			document.getElementById("ddz_"+i).style.color="#666";
			document.getElementById("ddz_c_"+i).style.display="none";
		}
	}
}

function show_wj(num)
{
	for (var i=1;i<= 4;i++)
	{
		if (num==i)
		{
			document.getElementById("wj_"+i).style.background="url(index/images/sy_middle_wj_an01.jpg) no-repeat center";
			document.getElementById("wj_"+i).style.color="#fff";
			document.getElementById("wj_c_"+i).style.display="block";
		}
		else
		{
			document.getElementById("wj_"+i).style.background="url(index/images/sy_middle_wj_an02.jpg) no-repeat center";
			document.getElementById("wj_"+i).style.color="#390";
			document.getElementById("wj_c_"+i).style.display="none";
		}
	}
}