<script type="text/javascript">
    function getNextStep() {
        steps = new Array("step1", "step2", "step3")

        if($('#hiddenInput').val() == "") {
            $('#hiddenInput').val('0');
            $('#addWordsStep').html(steps[0]);
        }
        else {
            nr = $('#hiddenInput').val();
            nr++;
            $('#hiddenInput').val(nr);
            $('#addWordsStep').html(steps[nr]);
            alert(nr);
        }


    }
</script>
<div id="addWords">
    <p id="addWordsStep">asd</p>
    <form id="someForm">
    name: <input type="text" id="name"><br />
    <input type="submit" id="submitBtn"><br />

    <input type="hidden" value="" id="hiddenInput">
    </form>
    <input type="button" onclick="getNextStep()" />
</div>