if(typeof(nfirst)!="undefined"){document.getElementById("n"+nfirst).style.color='red'}
else if(typeof(sfirst)!="undefined"){document.getElementById("s"+sfirst).style.color='red'}
else if(typeof(bfirst)!="undefined"){document.getElementById("c"+bfirst).style.color='red'}
if(typeof(sfirst)!="undefined"){show(sfirst);}
if(typeof(bfirst)!="undefined"){showc(bfirst);}else{showc(afirst);}