why wont this if statement work?

 
var pass = true;
 var Err
 var named =Form1.txtNamed.value;
 var unnamed =Form1.txtunNamed.value;
 
 if (unnamed =="NA") && (named =="NA")
 { Err = ("No vehcile was selected\r");  //error message set but not displayrd
  pass = false; //pass is set to false which means the form will not be submitted
  
 }

If i remove either of the conditions, so there is just one it works fine.
So on there own either condition works. Togerther it doenst worK

Does anyone know why?

(unnamed =="NA" && named =="NA")

To make it into a logic statement

THank you very much i knew it would be something simple. Just couldnt get my head in to gear.