window.size = function() {
    var w = 0;
    var h = 0;
    //IE
    if (!window.innerWidth) {
        //strict mode
        if (!(document.documentElement.clientWidth == 0)) {
            w = document.documentElement.clientWidth;
            h = document.documentElement.clientHeight;
        }
        //quirks mode
        else {
            w = document.body.clientWidth;
            h = document.body.clientHeight;
        }
    }
    //w3c
    else {
        w = window.innerWidth;
        h = window.innerHeight;
    }
    return { width: w, height: h };
}

window.center = function() {
    var hWnd = (arguments[0] != null) ? arguments[0] : { width: 0, height: 0 };
    var _x = 0;
    var _y = 0;
    var offsetX = 0;
    var offsetY = 0;
    //IE
    if (!window.pageYOffset) {
        //strict mode
        if (!(document.documentElement.scrollTop == 0)) {
            offsetY = document.documentElement.scrollTop;
            offsetX = document.documentElement.scrollLeft;
        }
        //quirks mode
        else {
            offsetY = document.body.scrollTop;
            offsetX = document.body.scrollLeft;
        }
    }
    //w3c
    else {
        offsetX = window.pageXOffset;
        offsetY = window.pageYOffset;
    }
    _x = ((this.size().width - hWnd.width) / 2) + offsetX;
    _y = ((this.size().height - hWnd.height) / 64) + offsetY;
    return { x: _x, y: _y };
}
function getPageEventCoords(evt) {
    try {
        var coords = { left: 0, top: 0 };
        if (evt.pageX) {
            coords.left = evt.pageX;
            coords.top = evt.pageY;
        } else if (evt.clientX) {
            coords.left = evt.clientX + document.body.scrollLeft - document.body.clientLeft;
            coords.top = evt.clientY + document.body.scrollTop - document.body.clientTop;
            if (document.body.parentElement && document.body.parentElement.clientLeft) {
                var bodParent = document.body.parentElement;
                coords.left += bodParent.scrollLeft - bodParent.clientLeft;
                coords.top += bodParent.scrollTop - bodParent.clientTop;
            }
        }
        return coords;
    } catch (e) { alert("@getPageEventCoords"); }
}