Add Comps with specific name to render queue

Hey,

i am new to scripting and i try to make a script which adds comps that start with a specific name to the render queue.

For example: I would like to add all the comps that start with the name "ET_" to the render queue.

I created a for loop that goes throught the items in my project and i want to store these items in an array. That array should then be sent to the render queue. Please could you help me out, i am kind of stuck That's the code I have so far:

function renderItems(etNum) {

    app.beginUndoGroup("Render Items");

    var comps = [];

    var et = [];

    var itemName;

    for(var i = 1; i<=app.project.numItems; i++) {

        itemName = app.project.item(i).name;

        if(app.ptoject.item(i) instanceof CompItem) {

            comps.push(app.project.item(i));

            }

        //et checks

        if(itemName.name() == "ET_*") {

            et.push(app.project.item(i));

            }

        }

app.endUndoGroup();

    }

Thanks a lot!