var main_height = 0;

function set_body_height() {

main_height = document.getElementById("inner_wrapper").offsetHeight;

document.getElementById("l_bg_shadow").style.height = main_height + "px";

document.getElementById("r_bg_shadow").style.height = main_height + "px";

main_height = document.getElementById("inner_wrapper").offsetHeight;

}

set_body_height();


function set_body_height_check() {
if (main_height != document.getElementById("inner_wrapper").offsetHeight) {

document.getElementById("l_bg_shadow").style.height = "auto";

document.getElementById("r_bg_shadow").style.height = "auto";

set_body_height();
}

}

var body_Interval = 0;
body_Interval = window.setInterval("set_body_height_check()",200);