//DROP DOWN NAVIGATION FOR LEFT or CHILD MENU
activateMenu = function(nav_child) {
        var navroot = document.getElementById(nav_child);
        var lis=navroot.getElementsByTagName("LI"); 
        for (i=0; i<lis.length; i++) {
            if(lis[i].lastChild.tagName=="UL"){
                lis[i].onmouseover=function() {this.lastChild.style.display="block";}
                lis[i].onmouseout=function()  {this.lastChild.style.display="none";}
            }
        }
    }
window.onload= function(){activateMenu('nav_child');}