//creando la clase pila      
 var Stack = function(size) {
     this.Size = size;
     this.Stacker = new Array(size);
     this.pointer = 0;
     //funciones          
     //inserta a la pila          
     this.Push = function(cadena) {
         if (this.IsFull() == false) {
             this.Stacker[this.pointer] = cadena;
             this.pointer++;
             return true;
         } else {
             return false;
         }
     }
     //saca de la pila          
     this.Pop = function() {
         if (this.IsEmpty != true) {
             this.pointer--;
             return this.Stacker[this.pointer];
         } else {
             return false;
         }
     }
     //esta vacia?          
     this.IsEmpty = function() {
         if (this.pointer == 0) return true;
         else return false;
     } //esta llena?          
     this.IsFull = function() {
         if (this.pointer == this.Size) return true;
         else return false;
     }
 } 

Jorge Hernandez :: http://jorgeluis.com.mx

    Metodos numericosNotacion Polaca