function product_list_compare() {
    var ps  = new Array();

    $('#product_list_form input.comp').each(function () {
        if( this.checked ) {
            ps.push(this.value);
        }
    });

    if( ps.length > 10 ) {
        alert('Maximum 10 terméket hasonlíthat össze!');

        return;
    }

    if( ps.length == 0 ) {
        return;
    }

    $.nyroModalManual({
        url: '/product/compare/' + ps.join(','),
	minHeight:100
    });
}