var state;
window.onload=function() {
obj=document.getElementById("info");
state=(state==null)?"hide":state;
obj.className=state;

document.getElementById("setup").onclick=function() {
obj.className=(obj.className=="show")?"hide":"show";
state=obj.className;
setCookie();
return false;
}
}

function setCookie() {
exp=new Date();
plusMonth=exp.getTime()+(31*24*60*60*1000);
exp.setTime(plusMonth);
document.cookie="State="+state+";expires="+exp.toGMTString();
}

function readCookie() {
if(document.cookie) {
state=document.cookie.split("State=")[1];
}
}
readCookie();