// Подбираем размеры так, чтобы у окна не появлялась полоса прокрутки
function init() {
var height;

if (document.getElementById("page_header") != null)
   document.getElementById("page_header").style.height="60";
height = (document.all == null ? window.innerHeight : document.body.clientHeight);
my_page_content = document.getElementById("page_content");
my_page_content.style.position = "relative";
my_page_content.style.overflow = "auto";

my_page_content.style.left = document.getElementById("menu").offsetLeft - 20;
my_page_content.style.height = height - 
                 document.getElementById("page_content").offsetTop -
                 document.getElementById("page_footer").offsetHeight -
                 2 ;
my_page_content.style.width = document.getElementById("menu").offsetWidth + 8 - 4;
window.onresize=init;
}