Codesine/implementation

So far I have this running along with html that's just an input box with the ID read and a button to call EVAL. I'm wondering if I should bother trying to implement named variables, or just go with making people use numbers as variable references.

function program { 	this.wavesets = []; this.add = function(name,f,a) { //here I should be able to take a string and convert it to an array index //or if not found, create a new index. Thus allowing named wavesets. } function waveset { 	this.waves = []; this.add = function(f,a) { f = Math.min(Math.abs(f)); while (f >= this.waves.length) { this.waves.push(0); } 		this.waves[f] = a; 	}; this.weval = function(input) { //No idea if this is how cosine wave transform works. var total = this.waves[0]; for (var loop = 1; loop < this.waves.length ; loop++) { total += (1/loop)/Math.cos(input)*this.waves[loop]; } 		return total; }; 	this.waverage = function(total) { return total/this.waves.length; }; } function LineEval(commands) { switch(commands[0]) { case "addwave": if (commands.length == 3) { Waveset.add(commands[1],commands[2]); } else { window.alert("Wrong number of arguments for " + commands[0]); } 			break; case "print": if (commands.length == 2) { window.alert(Waveset.weval(commands[1])); } else { window.alert("Wrong number of arguments for " + commands[0]); } 			break; case "alert": for (var loop = 1; loop < commands.length ; loop++) { window.alert(commands[loop]); } 			break; case "nop": break; default: window.alert('Command "'+commands[0]+'" not understood, skipped.'); } } function EVAL { //read var command = document.getElementById("read").value; LineEval(command.split(" ")); } var Waveset = new waveset;