// enable/disable 
function setSizeStyle() {
    if (document.getElementById) {
        document.getElementById("sizer").disabled = false;            
        var styleCookie = getCookie("fontSize");
        var styleIDs = ["smallStyle", "largeStyle"];
        for (var i = 0; i < styleIDs.length; i++) {
            if (styleCookie == styleIDs[i]) {
                document.getElementById(styleIDs[i]).disabled = false;            
            } else {
                document.getElementById(styleIDs[i]).disabled = true;    
            }
        }
    }
}
// set active style now, before content renders
setSizeStyle();

// invoked by clicking on sizer icons
function changeSizeStyle(styleID) {
    setCookie("fontSize", styleID, getExpDate(180, 0, 0));
    setSizeStyle();
}