function f1()
{
        height_work_screen = document.body.clientHeight;
        width_work_screen = document.body.clientWidth;
        page_bg = document.getElementById("page_bg_l").clientHeight;
        if (height_work_screen > page_bg)
        {
            document.getElementById("page_bg_l").style.height = height_work_screen+'px';
            document.getElementById("page_bg_r").style.height = height_work_screen+'px';
        };
        if (width_work_screen < 1160)
        {
            document.getElementById("page_bg_l").style.background = 'none';
            document.getElementById("page_bg_r").style.background = 'none';
        }
		else
        {
            document.getElementById("page_bg_l").style.background = 'url(/images/page_bg_l.jpg) repeat-y';
            document.getElementById("page_bg_r").style.background = 'url(/images/page_bg_r.jpg) right repeat-y';
        };
}
if (window.addEventListener)
window.addEventListener("load", f1, false)
else if (window.attachEvent)
window.attachEvent("onload", f1);
window.onresize = function() {f1();}