sfHover = function() {
    if (document.getElementById("secondaryNav")) {
        var sfEls = document.getElementById("secondaryNav").getElementsByTagName("LI");
        for (var i = 0; i < sfEls.length; i++) {
            sfEls[i].onmouseover = function() {
                this.className += " sfhover";
            }
            sfEls[i].onmouseout = function() {
                this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
            }
        }
    }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

 
/* nav submenu show/hide */ 
function show_menu_layer(el_container) { 
    el_container.className = (el_container.className.indexOf('open')!=-1)? el_container.className.replace(/open/, '') : el_container.className+' open'; 
    return false; 
}
 

function toggle_sitemap() {   
    var el_container = document.getElementById("sitemap");  
    el_container.className = (el_container.className.indexOf('hide')!=-1)? el_container.className.replace(/hide/, '') : el_container.className+' hide';   
}  

/* nav images preload */
img = new Image(); img.src = '/Images/nav_home_about_on.gif';
img = new Image(); img.src = '/Images/nav_home_private_on.gif';
img = new Image(); img.src = '/Images/nav_home_international_on.gif';
img = new Image(); img.src = '/Images/nav_home_brokerage_on.gif';
img = new Image(); img.src = '/Images/nav_home_brokerage_on.gif';
img = new Image(); img.src = '/Images/nav_home_research_on.gif';
img = new Image(); img.src = '/Images/nav_careers_on.gif';
img = new Image(); img.src = '/Images/nav_home_contactus_on.gif';
img = new Image(); img.src = '/Images/nav_bwa_home_about_on.gif';
img = new Image(); img.src = '/Images/nav_bwa_home_services_on.gif';
img = new Image(); img.src = '/Images/nav_bwa_home_careers_on.gif';
img = new Image(); img.src = '/Images/nav_about_on.gif'; 
img = new Image(); img.src = '/Images/nav_private_on.gif'; 
img = new Image(); img.src = '/Images/nav_international_on.gif'; 
img = new Image(); img.src = '/Images/nav_brokerage_on.gif'; 
img = new Image(); img.src = '/Images/nav_institutions_on.gif';
img = new Image(); img.src = '/Images/nav_research_on.gif'; 
img = new Image(); img.src = '/Images/nav_careers_on.gif'; 
img = new Image(); img.src = '/Images/nav_contactus_on.gif';
img = new Image(); img.src = '/Images/nav_bwa_about_on.gif'; 
img = new Image(); img.src = '/Images/nav_bwa_services_on.gif'; 
img = new Image(); img.src = '/Images/nav_bwa_careers_on.gif';