window.onload=function()
{
	center();
}

window.onresize=function()
{
	center();
}

function center() {
	var size = window.getSize();
	var size1 = $('tlo').getSize();
	var gora = Math.round((size.y-size1.y-1)/2);
	if (gora<0) gora=0;
	$('tlo').setStyle('margin-top',gora+'px');
}