/**
 * Gets page's size
 *
 * @return {Object} - returns an object 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 (width) less then height (width) of the viewport
    return {
        page: {
            width:  ((xScroll < windowWidth) ? windowWidth : xScroll),
            height: ((yScroll < windowHeight) ? windowHeight : yScroll)
        },
        window: {
            width:  windowWidth,
            height: windowHeight
        }
    };
};

/**
 * Gets page's scroll values
 *
 * @return {Object} - returns an object with x,y page scroll values.
 */
function getPageScroll() {
    var xScroll, yScroll;
    if (self.pageYOffset) {
        yScroll = self.pageYOffset;
        xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
        yScroll = document.documentElement.scrollTop;
        xScroll = document.documentElement.scrollLeft;
    } else if (document.body) { // all other Explorers
        yScroll = document.body.scrollTop;
        xScroll = document.body.scrollLeft;
    }

    return {
        xScroll:    xScroll,
        yScroll:    yScroll
    };
};

$(function() {
    if (window.globalPrepareDisplay != undefined && typeof(globalPrepareDisplay) == "function") {
        globalPrepareDisplay();
    };
});