function thomas_hover(){if (document.images){document.images['thomas'].src=menu_thomas_hover.src;}}
function thomas_off(){if (document.images){document.images['thomas'].src=menu_thomas.src;}}
function peter_hover(){if (document.images){document.images['peter'].src=menu_peter_hover.src;}}
function peter_off(){if (document.images){document.images['peter'].src=menu_peter.src;}}
function kontakt_hover(){if (document.images){document.images['kontakt'].src=menu_kontakt_hover.src;}}
function kontakt_off(){if (document.images){document.images['kontakt'].src=menu_kontakt.src;}}
function impressum_hover(){if (document.images){document.images['impressum'].src=menu_impressum_hover.src;}}
function impressum_off(){if (document.images){document.images['impressum'].src=menu_impressum.src;}}

function kreisel_1_menu_hover(id){document.getElementById('menu').style.backgroundImage ="url(images/kreisel_1_menu.png)";}
function kreisel_1_top_hover(id){document.getElementById('top_right').style.backgroundImage ="url(images/kreisel_1_top.png)";}
function kreisel_1_right_hover(id){document.getElementById('right').style.backgroundImage ="url(images/kreisel_1_right.png)";}

function kreisel_2_menu_hover(id){document.getElementById('menu').style.backgroundImage ="url(images/kreisel_2_menu.png)";}
function kreisel_2_top_hover(id){document.getElementById('top_right').style.backgroundImage ="url(images/kreisel_2_top.png)";}
function kreisel_2_right_hover(id){document.getElementById('right').style.backgroundImage ="url(images/kreisel_2_right.png)";}

function kreisel_3_menu_hover(id){document.getElementById('menu').style.backgroundImage ="url(images/kreisel_3_menu.png)";}
function kreisel_3_top_hover(id){document.getElementById('top_right').style.backgroundImage ="url(images/kreisel_3_top.png)";}
function kreisel_3_right_hover(id){document.getElementById('right').style.backgroundImage ="url(images/kreisel_3_right.png)";}

function kreisel_4_menu_hover(id){document.getElementById('menu').style.backgroundImage ="url(images/kreisel_4_menu.png)";}
function kreisel_4_top_hover(id){document.getElementById('top_right').style.backgroundImage ="url(images/kreisel_4_top.png)";}
function kreisel_4_right_hover(id){document.getElementById('right').style.backgroundImage ="url(images/kreisel_4_right.png)";}

function kreisel_0_menu_hover(id){document.getElementById('menu').style.backgroundImage ="url(images/kreisel_0_menu.png)";}
function kreisel_0_top_hover(id){document.getElementById('top_right').style.backgroundImage ="url(images/kreisel_0_top.png)";}
function kreisel_0_right_hover(id){document.getElementById('right').style.backgroundImage ="url(images/kreisel_0_right.png)";}

menu_thomas_hover = new Image();menu_thomas_hover.src="images/menu_thomas_hover.png"
menu_thomas = new Image();menu_thomas.src="images/menu_thomas.png"
menu_peter_hover = new Image();menu_peter_hover.src="images/menu_peter_hover.png"
menu_peter = new Image();menu_peter.src="images/menu_peter.png"
menu_kontakt_hover = new Image();menu_kontakt_hover.src="images/menu_kontakt_hover.png"
menu_kontakt = new Image();menu_kontakt.src="images/menu_kontakt.png"
menu_impressum_hover = new Image();menu_impressum_hover.src="images/menu_impressum_hover.png"
menu_impressum = new Image();menu_impressum.src="images/menu_impressum.png"