function getObject(objectId) {
 if(document.getElementById && document.getElementById(objectId)) { 
 return document.getElementById(objectId);
 }
 else if (document.all && document.all(objectId)) {
 return document.all(objectId);
 }
 else if (document.layers && document.layers[objectId]) {
 return document.layers[objectId];
 }
 else {
 return false;
 }
}

var yuan="";
function xy(sbut,n,num){
if(yuan==n) return;
for(i=1;i<=num;i++){ getObject(sbut+i).style.display="none"; }
getObject(sbut+n).style.display="block";
yuan=n;
}

var inx=1;
var refreshQueryTimer = null ;
var refreshHot = null ;
refreshHot = setTimeout('refreshQuery();', 2000);

function sfimg(inx) {
xy('swch_',inx,3);
clearTimeout(refreshHot);
refreshHot = null;
refreshHot = setTimeout('refreshQuery();', 4000);
}

function refreshQuery(){
	if (inx > 3) {	inx = 1 ; }
	xy('swch_',inx++,3);
	refreshHot = null;
	refreshHot = setTimeout('refreshQuery();', 2000);
}