// JScript 文件

var cn=1;
function startRef(){
window.setInterval('refreshProgress()', 2500);
}

function refreshProgress(){
 
var divo=document.getElementById('refulsh');
if(cn==1){
 document.getElementById("img1").style.display="block";
 document.getElementById("img2").style.display="none";
 document.getElementById("img3").style.display="none";
 cn=2;
}else if(cn==2){
 document.getElementById("img1").style.display="none";
 document.getElementById("img2").style.display="block";
 document.getElementById("img3").style.display="none";
cn=3;
 
}else if(cn==3){
 document.getElementById("img1").style.display="none";
 document.getElementById("img2").style.display="none";
 document.getElementById("img3").style.display="block";
cn=1;
 
}

}