function set_left_bg_color(bg_id)
{
	var u_bg_id = 'left_bg_' + bg_id;
	document.getElementById(u_bg_id).style.backgroundColor="#ab8b5b";
}

function homepages(obj,url)
{
    obj.style.behavior='url(#default#homepage)';
    obj.setHomePage(url);
}