function showo(){
	var md1=document.getElementById("md01");
	var md2=document.getElementById("md02");
	var md3=document.getElementById("md03");
	var sd1=document.getElementById("sd01");
	var sd2=document.getElementById("sd02");
	var sd3=document.getElementById("sd03");
	var zjb=document.getElementById("zj_bac");
	zjb.className="zjf_b z_b01"; 
	md1.className="lt01 hoveron"; 
	md2.className="lt02 hoveroff";
	md3.className="lt03 hoveroff";  
	sd1.style.display="block";
	sd2.style.display="none";
	sd3.style.display="none";
}
function showt(){
	var md1=document.getElementById("md01");
	var md2=document.getElementById("md02");
	var md3=document.getElementById("md03");
	var sd1=document.getElementById("sd01");
	var sd2=document.getElementById("sd02");
	var sd3=document.getElementById("sd03");
	var zjb=document.getElementById("zj_bac");
	zjb.className="zjf_b z_b02"; 
	md1.className="lt01 hoveroff"; 
	md2.className="lt02 hoveron";
	md3.className="lt03 hoveroff";
	sd1.style.display="none";
	sd2.style.display="block";
	sd3.style.display="none";
}
function shows(){
	var md1=document.getElementById("md01");
	var md2=document.getElementById("md02");
	var md3=document.getElementById("md03");
	var sd1=document.getElementById("sd01");
	var sd2=document.getElementById("sd02");
	var sd3=document.getElementById("sd03");
	var zjb=document.getElementById("zj_bac");
	zjb.className="zjf_b z_b03"; 
	md1.className="lt01 hoveroff"; 
	md2.className="lt02 hoveroff";
	md3.className="lt03 hoveron"; 
	sd1.style.display="none";
	sd2.style.display="none";
	sd3.style.display="block";
}