function random_image()
{   var i = Math.round(Math.random()*6);

    // In Abhängigkeit von i ein anderes Bild laden
    if ( i == 0 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/allianz.png";
    }
    else
    if ( i == 1 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/anemone.png";
    }
    else
    if ( i == 2 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/dreamy.png";
    }
    else
    if ( i == 3 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/eisbach.png";
    }
    else
    if ( i == 4 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/millemiglia.png";
    }
    else
    if ( i == 5 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/pastels.png";
    }
    if ( i == 6 )
    {   document.images["id1"].src = "./pho-t-ographic-s_files/PNG/pyro.png";
    }
}