Hi, Generally, there are two methods to call a function from a string.

1. Using eval.
2. Using window object.

First solution is using **eval**. It is easy to use but generally real programmers avoid to use this.

Example 1 without arguments:

var funName = "executeMe";
eval(funName)();
function executeMe() {
    alert('executeMe')
}

Example 2 with arguments:

var funName = "executeMe";
eval(funName)("First argument", "Second argument");
function executeMe(arg1, arg2) {
    alert("Argument1 = " + arg1);
    alert("Argument12 =  " + arg2);
}

But there are several issues with **eval** like

1. Security issues: It can be injected by third party commands or user input.
2. Hard to debug: You will have no line numbers.

Now second one is to use **window** object which reference to current window.

example 1 without arguments:

function executeMe() {
    alert('executeMe');
}
var funName = "executeMe";
var fn = window[funName]
if (typeof fn === "function") fn();

Example 2 with arguments:

function executeMe(arg1, arg2, arg3) {
    alert("Argument1 = " + arg1);
    alert("Argument2 = " + arg2);
    alert("Argument3 = " + arg3);
}
var funName = "executeMe";
var fnParams = [1, 2, 3];
var fn = window[funName]
if (typeof fn === "function") fn.apply(null, fnParams);

The second solution is better than using eval as it is safer, less chances of errors, easy to debug and it will execute faster.