Javascript: Can I avoid closures?

I am trying to make an website. I am putting addEventListener to more elements in a function called more times:

    idImag = 0;

    function function1()
    {
        //do something
        function2()
    }

    function function2()
    {
        //do something
        document.getElementBy开发者_高级运维Id("holder" + idImag).addEventListener('mouseover',function(){
         idImag++;
alert('It works');
    }

    function3(event)
    {
        alert(3);
    }

    function1();
    function1();

<div id="holder0">Dog</div>
<div id="holder1">Chicken</div>
<div id="holder2">Cow</div>

But there is a problem: Only the last element gets the event listener... the others do nothing after putting the mouse over it. Then I've googled a little and found out about closures and how variables are kept even after function returned... I didn't understand everything, but I just want to find out how to put the event listeners in function2. Can you help me? Probably you noticed: I am a newbie. Sorry if the question is stupid or if it has no sense. If you need more details, I will put my whole code, but it has variables and comments in Romanian, so I am not sure if you will understand it. Sorry for my bad English and thank you in advance.

Why not a for loop?

function function3 (event) {
    alert(3);
}

for (var idImag = 0; i< numberOfHolders; i++) {
    //do something1
    //do something2
    document.getElementById("holder" + idImag).addEventListener('mouseover',function3);
}

It looks like you just care about the image id, which is available through the id attribute of the element.

Thus you can do:

document.getElementById("holder" + idImag).addEventListener(
    'mouseover',
    function(){
        var id = this.id;
        /* Then strip off "holder" from the front of that string */
    }
);

This looks correct, in that it will call document.getElementById("holder0").addEventListener(…), then it will call document.getElementById("holder1").addEventListener(…). Closures aren't your problem there.

You can verify this by, eg, using console.log to log the element that you're adding the event listener to (you'll need Firebug installed, or Chrome's developer console open).

Maybe paste the code to http://jsfiddle.net/ so we can try it?