Check the Fiddle to see the failure occurring.

When I add Data (Even if I leave it empty) to the text box and try to click "Add" it doesn't do anything.

Opening the Chrome and Firefox console both give me the same error, it says "changeText2()" is not defined.

How can I fix this? I've ran into this error several times and mostly it had really weird workarounds, but I am not sure as to the method for avoiding it or what I'm even doing wrong.

It seems removing the global variable declarations fixes it most of the time, however, I need them in this case and would rather know why and how this error occurs.

Javascript:

var list = document.getElementById('deliveryIdArray');

var names = [];



function changeText2() {

    var deliveryIdentification = document.getElementById('deliveryIdentification').value;

    names.push(deliveryIdentification);//simply add new name to array;

    //array changed re-render list

    renderList();

}



function renderList(){

    while (list.firstChild) {

        list.removeChild(list.firstChild);

    }

    //create each li again

    for(var i=0;i<names.length;i++){

        var entry = document.createElement('li');

        entry.appendChild(document.createTextNode(names[i]));

        var removeButton = document.createElement('button');

        removeButton.appendChild(document.createTextNode("remove"));

        removeButton.setAttribute('onClick','removeName('+i+')');

        entry.appendChild(removeButton);

        list.appendChild(entry);

    }

}





function removeName(nameindex){

    names.splice(nameindex,1);

    //array changed re-render list

    renderList();

}



function getDeliveries(){

    return names;

}

HTML:

<b>Number(s): </b>

    <input id = "deliveryIdentification" name = "deliveryIdentification" type = "text" size = "16" maxlength = "30">



    <!-- Array Area Creation -->

    <input type='button' onclick='changeText2()' value='Add' />



    <ol id="deliveryIdArray">

    </ol>

Fiddle: http://jsfiddle.net/vSHQD/