Javascript：IE全高

Question

我有以下代码来计算this site灯箱插件的窗口宽度。

     * getPageSize() by quirksmode.com
     *
     * @return Array Return an array with page width, height and window width, height
     */
    function ___getPageSize() {
        var xScroll, yScroll;
        if (window.innerHeight && window.scrollMaxY) {  
            xScroll = window.innerWidth + window.scrollMaxX;
            yScroll = window.innerHeight + window.scrollMaxY;
        } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
            xScroll = document.body.scrollWidth;
            yScroll = document.body.scrollHeight;
        } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
            xScroll = document.body.offsetWidth;
            yScroll = document.body.offsetHeight;
        }
        var windowWidth, windowHeight;
        if (self.innerHeight) { // all except Explorer
            if(document.documentElement.clientWidth){
                windowWidth = document.documentElement.clientWidth; 
            } else {
                windowWidth = self.innerWidth;
            }
            windowHeight = self.innerHeight;
        } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
            windowWidth = document.documentElement.clientWidth;
            windowHeight = document.documentElement.clientHeight;
        } else if (document.body) { // other Explorers
            windowWidth = document.body.clientWidth;
            windowHeight = document.body.clientHeight;
        }   
        // for small pages with total height less then height of the viewport
        if(yScroll < windowHeight){
            pageHeight = windowHeight;
        } else { 
            pageHeight = yScroll;
        }
        // for small pages with total width less then width of the viewport
        if(xScroll < windowWidth){  
            pageWidth = xScroll;        
        } else {
            pageWidth = windowWidth;
        }
        arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
        return arrayPageSize;
    };

我注意到在Internet Explorer 9中，当我点击图像并激活Lightbox插件时，透明后遮盖仅覆盖VIEWABLE高度而不是整个高度。

这会产生一个问题，因为如果我有另一张带有修改过的Lightbox插件的图片并点击透明叠加层下面，它会在页面顶部打开另一个空的灯箱窗口，无法关闭。

它适用于Chrome和Firefox。