function rollover( element , display )
{
	var prefix = 'menu_line_';
	$( prefix  + element ).style.display = ( display == 'on' ? 'block' : 'none' );
}

function rolloverTel( lang , display )
{
	var imgPath = '/images/';
	var phoneNum = 'footer_tel_' + lang + '.png';
	var phoneErgo = 'footer_tel2_' + lang + '.png';
	$( 'footer_tel' ).src = imgPath + ( display == 'on' ? phoneErgo : phoneNum );
}