/**
* Overlay anzeigen/ausblenden
*
*/
function zeige_overlay(overlay)
{
    document.getElementById("haus").className = (overlay ? overlay : "");
}

/**
* Bildvorladefunktion
*
*/
function preloadImages()
{
    document.Vorladen = new Array();

    if(document.images)
    {
        for(var i = 0; i < preloadImages.arguments.length; i++)
        {
            document.Vorladen[i] = new Image();
            document.Vorladen[i].src = preloadImages.arguments[i];
        }
    }
}

/* Bilder vorladen */
preloadImages(
    '../img/1_over.png',
    '../img/2_over.png',
    '../img/3_over.png',
    '../img/4_over.png',
    '../img/5_over.png',
//   '../img/7_over.png',
    '../img/6_over.png',
    '../img/8_over.png',
    '../img/9_over.png',
    '../img/10_over.png',
    '../img/11_over.png',
    '../img/12_over.png',
    '../img/13_over.png',
    '../img/14_over.png',
    '../img/15_over.png',
//    '../img/16_over.png',
//    '../img/17_over.png',
    '../img/18_over.png'
);