function change(){
if(pause1){
var iTimeoutID = setTimeout('change()', 1000);
return;};
if(document.getElementById("tu1").style.display != "none"){
fuwei();
document.getElementById("sz2").className="now";
document.getElementById("tu2").style.display="block";
var iTimeoutID = setTimeout('change()', 5000);
return;
}
if(document.getElementById("tu2").style.display!="none"){
fuwei();
document.getElementById("sz3").className="now";
document.getElementById("tu3").style.display="block";
var iTimeoutID = setTimeout('change()', 5000);
return;
}
if(document.getElementById("tu3").style.display!="none"){
	fuwei();
 document.getElementById("sz4").className="now";
 document.getElementById("tu4").style.display="block";
 var iTimeoutID = setTimeout('change()', 5000);
 return;
 }
 if(document.getElementById("tu4").style.display!="none"){
 fuwei();
 document.getElementById("sz5").className="now";
 document.getElementById("tu5").style.display="block";
 var iTimeoutID = setTimeout('change()', 5000);
 return;
 }
 if(document.getElementById("tu5").style.display!="none"){
 fuwei();
 document.getElementById("sz1").className="now";
 document.getElementById("tu1").style.display="block";
 var iTimeoutID = setTimeout('change()', 5000);
 return;
 }

}


function sd(num){
 fuwei();
 document.getElementById("sz"+num).className="now";
 document.getElementById("tu"+num).style.display="block";
}
function fuwei(){
 document.getElementById("sz1").className="";
 document.getElementById("sz2").className="";
 document.getElementById("sz3").className="";
 document.getElementById("sz4").className="";
 document.getElementById("sz5").className="";
 document.getElementById("tu1").style.display="none";
 document.getElementById("tu2").style.display="none";
 document.getElementById("tu3").style.display="none";
 document.getElementById("tu4").style.display="none";
 document.getElementById("tu5").style.display="none";
}
var pause1 = false;