[lord2kim]

Svetlana_,

<form  method=get action="#" name="chekcms">
  <input type=checkbox name="wordpress">wordpress<br>
  <input type=checkbox name="ucoz">ucoz<br>
  <input type=checkbox name="dle">dle<br>
</form>
 
<button id="myBut">click</button>
 
<script>
myBut.onclick = function () {
    var inp = document.getElementsByTagName('input');
    var length = inp.length;
    var mas = [];
 
    for (var i = 0; i < length; i++) {
        if (inp[i].checked) {
             mas.push(inp[i].nextSibling.textContent);//nodeValue, data
        }
    }
    alert(mas.join(','));
 
}
</script>