function win(uri,name,features){window.open(uri,name,features);}
function act(n){eval("document.images."+n+".src = "+n+"_on.src");}
function deact(n){eval("document.images."+n+".src = "+n+"_off.src");}
function preload(prefix,pic_array,extension){for(i=0;i<pic_array.length;i++){eval(pic_array[i]+'_off = new Image;');eval(pic_array[i]+'_on = new Image;');eval(pic_array[i]+'_off.src = "'+prefix+'/'+pic_array[i]+'_off.'+extension+'";');eval(pic_array[i]+'_on.src = "'+prefix+'/'+pic_array[i]+'_on.'+extension+'";');}}
preload('/nav/en',new Array('bt_schedererhaus','bt_typen','bt_sommer','bt_winter','bt_preise','bt_going','bt_anfrage'),'gif');preload('/nav',new Array('bt_copyright'),'jpg');