var str = "10000000000000";
	    			     	 		var num_dot = Math.floor((str.length / 3) - 1 );
	    			     	 		var multiplo = - 3;
	    			     	 		var r1 = "",
	    			     	 			total = "";


		    			     	 		r1 = str.split("");


		    			     	 		for(i = 0; i <= num_dot ; i++){
		    			     	 			r1.splice(multiplo, 0, ".");
			    			     	 		console.log(r1 , multiplo);
			    			     	 		multiplo = multiplo - 4;
		    			     	 		}

		    			     	 		if(r1[0] == ".")
		    			     	 		r1.shift();
		    			     	 		total= r1.join("");


		    			     	 		console.log(total);