var clickbutton='';

NavArray=new Array ("term","rueck","neu","treff","kont","karo");

function change(bild)
{

document.images[bild].src='images/'+document.images[bild].name+'_on.gif';

}

function changeback(bild)
{

if (bild!=clickbutton)
{

document.images[bild].src='images/'+document.images[bild].name+'_off.gif';

}
}

function changeclick2(bild)
{
clickbutton=bild;

for(i=0;i<NavArray.length;i++){
eval("document.images['"+NavArray[i]+"'].src='images/"+NavArray[i]+"_off.gif'");
}
document.images[bild].src='images/'+document.images[bild].name+'_on.gif';

}