function AdjustLayer()
{
    if (document.documentElement.clientWidth < 900)
    {
        aspnetForm.style.width = "900px";
        MiddleContent.style.marginLeft = "0px";
        BottomInfor.style.marginLeft = "0px";
    }
    else
    {
        aspnetForm.style.width = document.documentElement.clientWidth + "px";
        MiddleContent.style.marginLeft = Math.round((document.documentElement.clientWidth-parseInt(MiddleContent.style.width)-4)/2)+"px";
        BottomInfor.style.marginLeft = MiddleContent.style.marginLeft;
    }    
    MiddleContent.style.marginRight = MiddleContent.style.marginLeft;
    BottomInfor.style.marginRight = BottomInfor.style.marginLeft;
    
}
AdjustLayer();
window.onresize = AdjustLayer;