<?
public static function Vision(){
    global $APPLICATION;
    $off = $APPLICATION->get_cookie('off');
    $img = $APPLICATION->get_cookie('img');
    $size = $APPLICATION->get_cookie('size');
    $color = $APPLICATION->get_cookie('bg');
    $allClass = ' class="';
    if($off){
        $allClass = $allClass.'off-'.$off;
    }
    if($img){
        $allClass = $allClass.' img-'.$img;
    }
    if($size){
        $allClass = $allClass.' size-'.$size;
    }
    if($color){
        $allClass = $allClass.' bg-'.$color;
    }
    $allClass = $allClass.'"';
    echo $allClass;
}

?>