/* JavaScript Rollover */
<!-- 
browser_name = navigator.appName; browser_ver = parseInt(navigator.appVersion);
if ((browser_name == "Netscape" && browser_ver >= 3) || (browser_name == "Microsoft Internet Explorer" && browser_ver >=4)) 
version = "yes";else version = "no"; if (version == "yes") { btns = new Array(16); for (c=0; c<=15; c++) { btns[c] = new Image(); } 
btns[0].src = "images/menu/home_b.png"; 
btns[1].src = "images/menu/speakers_b.png"; 
btns[2].src = "images/menu/panels_b.png"; 
btns[3].src = "images/menu/tables_b.png"; 
btns[4].src = "images/menu/agenda_b.png"; 
btns[5].src = "images/menu/register_b.png"; 
btns[6].src = "images/menu/venue_b.png"; 
btns[7].src = "images/menu/contact_b.png"; 
btns[8].src = "images/menu/home_a.png"; 
btns[9].src = "images/menu/speakers_a.png"; 
btns[10].src = "images/menu/panels_a.png"; 
btns[11].src = "images/menu/tables_a.png"; 
btns[12].src = "images/menu/agenda_a.png"; 
btns[13].src = "images/menu/register_a.png"; 
btns[14].src = "images/menu/venue_a.png"; 
btns[15].src = "images/menu/contact_a.png"; 
nm = new Array("home","speakers","panels","tables","agenda","register","venue","contact"); }
function btn_chg(des,num) { if (version == "yes") { document.images[nm[des]].src = btns[num].src;  }}
function btn_rtn(des,num) { if (version == "yes") { document.images[nm[des]].src = btns[num+8].src;  }}
self.name="main"
// -->

/* Smooth Scroll Back to Top */
function backToTop() {
    var x1 = x2 = x3 = 0;
    var y1 = y2 = y3 = 0;

    if (document.documentElement) {
        x1 = document.documentElement.scrollLeft || 0;
        y1 = document.documentElement.scrollTop || 0;
    }

    if (document.body) {
        x2 = document.body.scrollLeft || 0;
        y2 = document.body.scrollTop || 0;
    }

    x3 = window.scrollX || 0;
    y3 = window.scrollY || 0;

    var x = Math.max(x1, Math.max(x2, x3));
    var y = Math.max(y1, Math.max(y2, y3));

    window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));

    if (x > 0 || y > 0)
        window.setTimeout("backToTop()", 25);
}