function initPage()
{
    initAutoScalingNav({
        menuId: "nav",
        sideClasses: true,
        spacing: 2,
        tag: "a"
    })
}
function initAutoScalingNav(o)
{
    if (!o.menuId) o.menuId = "nav";
    if (!o.tag) o.tag = "a";
    if (!o.spacing) o.spacing = 0;
    if (!o.constant) o.constant = 0;
    if (!o.minPaddings) o.minPaddings = 0;
    if (!o.liHovering) o.liHovering = false;
    if (!o.sideClasses) o.sideClasses = false;
    var nav = document.getElementById(o.menuId);
    if(nav)
    {
        var lis = nav.getElementsByTagName("li");
        var asFl = [];
        var lisFl = [];
        for (var i=0, j=0; i<lis.length; i++)
        {
            if(lis[i].parentNode == nav)
            {
                var t = lis[i].getElementsByTagName(o.tag).item(0);
                asFl.push(t);
                asFl[j++].width = t.offsetWidth;
                lisFl.push(lis[i]);
            }
            if(o.liHovering)
            {
                lis[i].onmouseover = function()
                {
                    this.className += " hover";
                }
                lis[i].onmouseout = function()
                {
                    this.className = this.className.replace("hover", "");
                }
            }
        }
        var menuWidth = nav.clientWidth - asFl.length*o.spacing - o.constant;
        if(getItemsWidth(asFl) < menuWidth)
        {
            for (var i=0; getItemsWidth(asFl) < menuWidth; i++)
            {
                asFl[i].width++;
                if(i >= asFl.length-1) i=-1;
            }
            for (var i=0; i<asFl.length; i++)
            {
                asFl[i].style.width = asFl[i].width + "px";
            }
        }
        else if(o.minPaddings > 0)
        {
            for (var i=0; i<asFl.length; i++)
            {
                asFl[i].style.width = asFl[i].width + o.minPaddings*2 + "px";
            }
        }
    }
    function getItemsWidth(a)
    {
        var w = 0;
        for(var q=0; q<a.length; q++)
        {
            w += a[q].width;
        }
        return w;
    }
    if(o.sideClasses)
    {
        lisFl[0].className += " first-child";
        lisFl[lisFl.length-1].className += " last-child";
    }
}
if (window.addEventListener)
    window.addEventListener("load", initPage, false);
else if (window.attachEvent)
    window.attachEvent("onload", initPage);