function changeImage(target,image) {
    document.images[target].src=image;
}

function showImage(image,x,y) {
    var object="image.php?image="+image+"&x="+x+"&y="+y;
    var show=window.open(object,"Image","width="+x+",height="+y+",top="+(screen.height-y)/2+",left="+(screen.width-x)/2+",location=no,scrollbars=no,resizable=no,menubar=no,toolbar=no,status=no");
    show.focus();
}

function getImage(x) {

    return 'img/haeuser_gr'+window.document.images[x].src.substr(window.document.images[x].src.search(/haeuser.+/)+7,window.document.images[x].src.length);
}