function toggle(id){
        if (document.getElementById){
            var arr = new Array('over','model','res', 'user', 'faq');
            for(var x=0; x<arr.length; x++) {
                  var e = document.getElementById(arr[x]);
                  e.style.display = 'none';
            }
            var el = document.getElementById(id);
            el.style.display = 'block';
        }

        if (id = 'res'){
            collapseTree('tree');
            expandToItem('tree','doc');
            expandToItem('tree','firm');
            expandToItem('tree','util');
            expandToItem('tree','help');
            expandToItem('tree','wht');
        }
    }

    function e100() {
        var e1 = document.getElementById("europa100");
        var e2 = document.getElementById("europa250");
        var e3 = document.getElementById("europa2500");
        e1.style.display = "block";
        e2.style.display = "none";
        e3.style.display = "none";     }

    function e250() {
        var e1 = document.getElementById("europa100");
        var e2 = document.getElementById("europa250");
        var e3 = document.getElementById("europa2500");
        e1.style.display = "none";
        e2.style.display = "block";
        e3.style.display = "none";
    }

    function e2500() {
        var e1 = document.getElementById("europa100");
        var e2 = document.getElementById("europa250");
        var e3 = document.getElementById("europa2500");
        e1.style.display = "none";
        e2.style.display = "none";
        e3.style.display = "block";
    }

    $(document).ready(
        function()
        {
            $('#dock').Fisheye(
                {
                    maxWidth: 20,
                    items: 'a',
                    itemsText: 'span',
                    container: '.dock-container',
                    itemWidth: 150,
                    proximity: 90,
                    halign : 'center'
                }
            )
        }
    );