function zt(size)
{
	if(size == -1)
	{
		var re=new RegExp('art_size'+"=[^;]+", "i"); //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			size = document.cookie.match(re)[0].split("=")[1] 	
		else
			size = 0;	
	}
	// set cookie
    var expdate = new Date ();
    expdate.setTime (expdate.getTime() + (3650 *24 * 60 * 60 * 1000));
	document.cookie = 'art_size='+size+'; path=/;expires=' + expdate;
	
	// 10, 12, 14	
	var tags = new Array('font', 'div','td','h6','h5','h4');
	var fontSize = new Array( '11px','13px','14px' );
	var lineHeight = new Array( '13px','18px','22px' );
	
	var dc = document.getElementById('akt_tresc');
	var vt;
	
	dc.style.fontSize = fontSize[size];
	dc.style.lineHeight = lineHeight[size];
	
	for ( i = 0 ; i < tags.length ; i++ ) 
	{
		vt = dc.getElementsByTagName( tags[ i ] );
		for ( j = 0 ; j < vt.length ; j++ )
		{ 
			vt[ j ].style.fontSize = fontSize[ size ];
			vt[ j ].style.lineHeight = lineHeight[size];
		}
	} 
}