// display none
function getStyle(x, styleProp) {
    if (x.currentStyle) {
        var y = x.currentStyle[styleProp];
    }
    else if (window.getComputedStyle) {
        var y = document.defaultView.getComputedStyle(x, null).getPropertyValue(styleProp);
    }
    return y;
}
function ftnone(e, div_name) {
    var el = document.getElementById(div_name);
    var display = el.style.display || getStyle(el, 'display');
    el.style.display = (display == 'none') ? 'block' : 'none';
    ftnone.el = el;
    if (e.stopPropagation) e.stopPropagation();
    e.cancelBubble = true;
    return false;
}