var s_img = null;
var wrapper = null;
var menu_block = null;
var on_menu = 0;
var timerID = 0;

s_img = document.getElementById('support_img');
menu_block = document.getElementById('support_menu_block');

s_img.onmouseover=function() {showMenu(); on_menu = 1;}
s_img.onmouseout=function() {imgOut(); on_menu = 0;}
menu_block.onmouseover=function() {showMenu(); on_menu = 1;}
menu_block.onmouseout=function() {imgOut(); on_menu = 0;}

function imgOut() {
    timerID = setTimeout('imgTimeOut()', 500);
}
function imgTimeOut() {
    if (on_menu == 0) {
        hideMenu();
        clearTimeout(timerID);
    }
}
function showMenu() {
    on_menu = 1;
    menu_block.style.display = 'block';
}
function hideMenu() {
    on_menu = 0;
    menu_block.style.display = 'none';
}