function register()
{
    darken_register();
    open_register();
}

function open_register()
{
    var Disabled_Load = document.getElementById('register_load');
    
    // w is a width of the newsletter panel
    w = 645;
    // h is a height of the newsletter panel
    h = 800;
    
    // get the x and y coordinates to center the newsletter panel
    xc = 200;
    yc = 30;
    
    // show the newsletter panel
    Disabled_Load.style.left = xc + "px";
    Disabled_Load.style.top  = yc + "px";
    Disabled_Load.style.display = 'block';
}


function close_register()
{
    // hide the newsletter panel
    var register_load = document.getElementById('register_load');
    register_load.style.display = 'none';
    // lighten the page again
    lighten_register();
}

function darken_register()
{
    var dark_register = document.getElementById('dark_register');
    dark_register.style.height = 2000 + 'px';
    dark_register.style.width = document.body.parentNode.scrollWidth + 'px';
    dark_register.style.display = 'block';
}

function lighten_register()
{
    var dark_register = document.getElementById('dark_register');
    dark_register.style.display = 'none';
}