function hover(obj){
    UL = obj.getElementsByTagName('ul');
    if(UL!=null && UL.length > 0){
        subMenu = UL[0].style;
        if(subMenu.display == 'none' || subMenu.display == ''){
            subMenu.display = 'block';
        } else {
            subMenu.display = 'none';
        }
    }
}

function openMenu(obj) {
	ul = obj.getElementsByTagName('ul');
	if(ul!=null && ul.length>0) {
        ul[0].style.display = 'block';
	}
}

function closeMenu(obj) {
	ul = obj.getElementsByTagName('ul');
	if(ul!=null && ul.length>0) {
        ul[0].style.display = 'none';
	}
}

function setHover() {
    if(isIE) {
        main_menu = document.getElementById('main-menu');
        LI = null;
        if(main_menu!= null)
            LI = main_menu.getElementsByTagName('li');
            
        if(LI!=null) {
            nLI = LI.length;
            for(i=0; i < nLI; i++) {
                LI[i].onmouseover = function() {
                    openMenu(this);
                }
                LI[i].onmouseout = function() {
                    closeMenu(this);
                }
            }
        }
    }
}

function highlight(menu_element, color) {
    var entry = document.getElementById(menu_element);
    entry.style.background = color;
}