window.onload = function() {
    var strCook = document.cookie;
    if(strCook.indexOf('!~')!=0) {
        var intS = strCook.indexOf('!~');
        var intE = strCook.indexOf('~!');
        var strPos = strCook.substring(intS+2,intE);
        document.getElementById('menu_alpha').scrollTop = strPos;
    }
}
function SetDivPosition() {
    var intY = document.getElementById('menu_alpha').scrollTop;
    document.cookie = 'yPos=!~' + intY + '~!';
}