function do_onload() {
    get_height();
    set_bg();
    set_active_menu();
    externalLinks();
}

window.onload = do_onload;

function get_height()
{
    var obj         =   document.getElementById('content');
    if(obj)
    {
        //  IE
        var obj_h   =   obj.offsetHeight;
        if(typeof(obj_h) !== 'number')
        {
            //  Moz
            var obj_h   =   document.defaultView.getComputedStyle(obj,"").getPropertyValue("height");
        }
        var obj_h       =   obj_h+400;
        minHeight       =   obj_h;
    }
}