imageNeutral = new Image(255,100);
                imageNeutral.src = "images/at_standard2.gif";

                imageStand = new Image(255,100);
                imageStand.src = "images/at_standleitungen2.gif";

                imageFirewall = new Image(255,100);
                imageFirewall.src = "images/at_firewall2.gif";

                imageWebdesign = new Image(255,100);
                imageWebdesign.src = "images/at_webdesign2.gif";

                imageEcommerce = new Image(255,100);
                imageEcommerce.src = "images/at_ecommerce2.gif";

                imageVpn = new Image(255,100);
                imageVpn.src = "images/at_vpn2.gif";

                imageHardware = new Image(255,100);
                imageHardware.src = "images/at_hardware.gif"

function chgStand(){
        document.images.atstandard.src=imageStand.src;
        }
function chgFirewall(){
        document.images.atstandard.src=imageFirewall.src;
        }
function chgWebdesign(){
        document.images.atstandard.src=imageWebdesign.src;
        }
function chgHardware(){
        document.images.atstandard.src=imageHardware.src;
        }
function chgEcommerce(){
        document.images.atstandard.src=imageEcommerce.src;
        }
function chgVpn(){
        document.images.atstandard.src=imageVpn.src;
        }
function chgNeutr(){
        document.images.atstandard.src=imageNeutral.src;
        }