function navinit(){
    
    subpage = $('mainnav').getElements('.subpage');
    
    subpage.each(function(element) {
            element.setStyle('display', 'none');
    });
    
    $('mainnav').setStyle('visibility', 'visible');
    
    subpage = $('mainnav').getElements('.active .subpage');
    
    subpage.each(function(element) {
            element.setStyle('display', 'block');
            
            height = element.getSize().y;
            height = height - 15;
            //console.log(height);
            
            var myFx = new Fx.Tween(element, { fps: 25, duration: '450ms',  unit : 'px', property: 'height'});
            myFx.start(0, height);
    });
    
    /*
    if (Browser.Engine.trident && Browser.Engine.version <= 4){
        
        //subpage = $('mainnav').getChildren().getChildren();
        
        subpage = $('mainnav').getChildren();
        
        li = subpage.getChildren();
       
        //console.log(li);

        alert("as");
        li.each(function(element) {
                element.setStyle('border', '1px solid red');
                //element.setStyle('background-image', 'url("/fileadmin/template/img/mainnav_index.png")');
        });

    }
    */
}

window.addEvent('domready', function() {
        // no navint if IE6
        if (!(Browser.Engine.trident && Browser.Engine.version <= 4)){
            navinit();
        } else {
            //nothing;
        }
});