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);}

<!--
function CheckEmails( a ) {
   var i = a.length;
   var temp = a.indexOf( '@' );
   var tempd = a.indexOf( '.' );
   if ( temp > 1 )
		{
		  if ( ( i - temp ) > 3 )
			   {
				 if ( ( i - tempd ) > 0 )
					  {
						return 1;
					  }
			   }
		}
   return 0;
}
function CheckEmail(){
	if (document.addemail.addemail.value==""){
		alert("The Msn or E-mail can't be empty!");
		return false;
	}
	if (CheckEmails(document.addemail.addemail.value)==""){
		alert("Be sure to fill in accurate email address, for the connection !");
		return false;
	}
	return true;
}
// -->