Depth first stack iterator in JavaScript

gistfile1.js

var data = ["a","b",["b1","b2","b3",["c1","c2"]],"c",["c1","c2"]];
var traverse = function(data, callback) {
	var current = [data, 0];
	var stack = [current];
	while(stack.length > 0) {
		if(current[1] >= current[0].length) {
			stack.pop();
			current = stack[stack.length-1];
			continue;
		}
		var item = current[0][current[1]];
		if($.isArray(item) && item.length > 0) {
			stack.push([item,0]);
			current[1]++;
			current = stack[stack.length-1];
			continue;
		}
		if(callback(item) === false) {
			return;
		}	
		current[1]++;
	}
};
traverse(data, function(item) {
	console.log(item);
	if(item === "c") {
		// stop on element "c"
		return false;
	}
});