var lists = new Array();

// First set of text and values
lists['avtomobili']    = new Array();
lists['avtomobili'][0] = new Array(
	'Porsche',
	'Lamborghini'
);
lists['avtomobili'][1] = new Array(
	'Porsche',
	'Lamborghini'
);

// Second set of text and values
lists['gumi']    = new Array();
lists['gumi'][0] = new Array(
	'15 inch',
	'17 inch'
);
lists['gumi'][1] = new Array(
	'15 inch',
	'17 inch'
);

function emptyList( ddm ) {
	while ( ddm.options.length ) ddm.options[0] = null;
}
function fillList( ddm, arr ) {
	for ( i = 0; i < arr[0].length; i++ ) {
		option = new Option( arr[0][i], arr[1][i] );
		ddm.options[ddm.length] = option;
	}
	ddm.selectedIndex=0;
}

function changeList( ddm ) {
	list = lists[ddm.options[ddm.selectedIndex].value];

	emptyList( ddm.form.tagove );

	fillList( ddm.form.tagove, list );
}