function rotation(obj,index) {
me=eval(obj);
me[index].style.display="none"
index++;
if(index==me.length)index=0;
me[index].style.display="block"
setTimeout("rotation('"+obj+"',"+index+")",5000);
}
window.onload=function(){
obj1=document.getElementsByClassName("ban1");rotation("obj1",0);
obj2=document.getElementsByClassName("ban2");rotation("obj2",0);
obj11=document.getElementsByClassName("ban11");rotation("obj11",0);
obj12=document.getElementsByClassName("ban12");rotation("obj12",0);
obj13=document.getElementsByClassName("ban13");rotation("obj13",0);
obj14=document.getElementsByClassName("ban14");rotation("obj14",0);
obj21=document.getElementsByClassName("ban21");rotation("obj21",0);
obj22=document.getElementsByClassName("ban22");rotation("obj22",0);
obj23=document.getElementsByClassName("ban23");rotation("obj23",0);
obj24=document.getElementsByClassName("ban24");rotation("obj24",0);
obj31=document.getElementsByClassName("ban31");rotation("obj31",0);
obj32=document.getElementsByClassName("ban32");rotation("obj32",0);
obj33=document.getElementsByClassName("ban33");rotation("obj33",0);
obj34=document.getElementsByClassName("ban34");rotation("obj34",0);
obj41=document.getElementsByClassName("ban41");rotation("obj41",0);
obj42=document.getElementsByClassName("ban42");rotation("obj42",0);
obj43=document.getElementsByClassName("ban43");rotation("obj43",0);
obj44=document.getElementsByClassName("ban44");rotation("obj44",0);
}