var logo_b1 = document.getElementById('logoMain');
var logo_b2 = document.getElementById('logoMove');
var logo_speed = 1;
var logo_pos = 0;
var logo_anim;

// INIT
logo_b1.style.width = logoswidth + 'px';
logo_b2.style.width = logoswidth + 'px';
logo_b2.style.left = logoswidth + 'px';
logo_b2.innerHTML = logo_b1.innerHTML;
logo_anim = window.setInterval('logo_move()', 20);


// LOOP
function logo_move () {
    logo_pos -= logo_speed;
    if (logo_pos * -1 > logoswidth) {
        logo_pos += logoswidth;
    }
    logo_b1.style.left = logo_pos + 'px';
    logo_b2.style.left = (logo_pos + logoswidth) + 'px';
}