Strange for loop in javascript

i have an helper class in javascript and i must use like this

menu
     .createMenu("TestMenu", "Description")
    .addMenuItem("test", "", true, true, "callServerTrigger", 
"testServerEvent")
.addMenuItem("test", "", true, true, "callServerTrigger", "testServerEvent")
.addMenuItem("test", "", true, true, "callServerTrigger", "testServerEvent")
.addMenuItem("test", "", true, true, "callServerTrigger", "testServerEvent")
   .addCloseButton();

but i must use for loop here.

menu
     .createMenu("TestMenu", "Description")
    for (var i = 0; i < arr.length; i++) {
        .addMenuItem(arr[i], "", true, true, "callServerTrigger", "testServerEvent")
    }
   .addCloseButton();

I tried this but "." gives syntax error. How can i make this ?