用js小类库获取浏览器的高度和宽度信息(2)

window.onload = window.onresize = function () {
var top = Math.round(Browser.Page.scrollTop() + (Browser.ViewPort.height() / 2) - (parseInt(document.getElementById("divCenter").style.height) / 2));
var left = Math.round(Browser.Page.scrollLeft() + (Browser.ViewPort.width() / 2) - (parseInt(document.getElementById("divCenter").style.width) / 2));
document.getElementById("divCenter").style.top = top + "px";
document.getElementById("divCenter").style.left = left + "px";
}