function DivMinMax(nummer) {
    var divID = 'mimatxt_' + nummer;
    var imgID = 'mimaimg_' + nummer;
    var self;

    DMM = false;
    if ( document.getElementById && document.getElementById( divID ) ) {
        Pdiv = document.getElementById( divID );
        self = document.getElementById( imgID );
        DMM = true;
    } else if ( document.all && document.all[ divID ] ) {
        Pdiv = document.all[ divID ];
        self = document.all[ imgID ];
        DMM = true;
    } else if ( document.layers && document.layers[ divID ] ) {
        Pdiv = document.layers[ divID ];
        self = document.layers[ imgID ];
        DMM = true;
    }
    if (DMM) {
        Pdiv.style.display = Pdiv.style.display == 'block' ? 'none' : 'block';
        self.src = ( Pdiv.style.display == 'none' ) ? 'images/minmax_down.gif' : 'images/minmax_up.gif';
    }
}