// kill framesets
//if (parent.frames.length> 0) 
//    top.location.replace(document.location);
    
// change header img class
function iSwitch(iMax) {
    var iOld = parseInt(document.getElementById('svimg').className.substr(5));
    var iNew = (iOld < iMax)? iOld + 1 : 1;
    document.getElementById('svimg').className = 'svimg'+iNew;
     
    setCookie('svimg', iNew);
} 

function setCookie (name, value) {
    var a = new Date();
    a = new Date(a.getTime() + 1000*60*60*24*365);
    document.cookie = name+'='+value+'; expires='+a.toGMTString()+'; path=/';
}