Function isVisible

Pagetual/pagetual.user.js:10669–10683

(el, win)

    }

    function isVisible(el, win) {
        if(!el || !el.offsetParent)return false;
        var loopable = true,
            visible = el.nodeName && win.getComputedStyle(el).display != 'none' && win.getComputedStyle(el).visibility != 'hidden';
        while(loopable && visible) {
            el = el.parentNode;

            if(el && el.nodeType === 1 && !compareNodeName(el, ["body"])) {
                visible = win.getComputedStyle(el).display != 'none' && win.getComputedStyle(el).visibility != 'hidden';
            }else {
                loopable = false;
            }
        }
        return visible;
    }

    function getElementTop(ele) {
        if (!ele) return 0;