Calendar.setup({
        inputField     :    "anreise",     // id of the input field
        ifFormat       :    "%A-%d-%B-%Y [%W] ",     // format of the input field (even if hidden, this format will be honored)
        displayArea    :    "show_d",       // ID of the span where the date is to be shown
        daFormat       :    "%A, %B %d, %Y",// format of the displayed date
        align          :    "Tl",           // alignment (defaults to "Bl")
        singleClick    :    true
    });
    Calendar.setup({
        inputField     :    "abreise",     // id of the input field
        ifFormat       :    "%A-%d-%B-%Y [%W] ",     // format of the input field (even if hidden, this format will be honored)
        displayArea    :    "show_d",       // ID of the span where the date is to be shown
        daFormat       :    "%A, %B %d, %Y",// format of the displayed date
        align          :    "Tl",           // alignment (defaults to "Bl")
        singleClick    :    true
    });