function showRegWin(){
                var win = document.getElementById('top_container');
                var _left = (document.body.offsetWidth/2-200).toFixed(0);
                var _top = ((document.body.offsetHeight-330)/2).toFixed(0);
								_top = 150;
                
                win.style.left = _left+'px';
                win.style.top = _top+'px';
                win.style.display = 'block';
}

function hideRegWin(){
                var win = document.getElementById('top_container');
                win.style.display = 'none';
}