function el(id) {
          if (document.getElementById) {
            return document.getElementById(id);
          } else if (window[id]) {
            return window[id];
              }
          return null;
    }

    function check(id)
    {
        var selectedText = el("whichSelectedText").value;
        var checkboxText = el(id).value;

        if(selectedText.indexOf(checkboxText) == -1 && el(id).checked == true)
        { // checked
            selectedText += ' "';
            selectedText += checkboxText;
            selectedText += '"';
        }
        else
        if(selectedText.indexOf(checkboxText) != -1 && el(id).checked == false)
        { // unchecked
            var index = selectedText.indexOf(checkboxText);

            selectedText = selectedText.replace(checkboxText,"");

            if(index > 1)
            {
                if(selectedText.charAt(index - 1) == '"')
                {
                    //erase space and slash before
                    var before = selectedText.substring(0,index-1);
                    var after = selectedText.substring(index);

                    selectedText = before + after;
                }
                if(selectedText.charAt(index - 1) =='"')
                {
                    var before = selectedText.substring(0,index-1);
                    var after = selectedText.substring(index);

                    selectedText = before + after;
                }
            }
        }

        el("whichSelectedText").value = selectedText;
    }

    function getWhichSelected()
    {
        var value = encodeURIComponent(el("whichSelectedText").value);

        if(value != null && value.length > 0)
            if(value.charAt(0) == '|')
                return value.substring(1);

        return value;
    }

    function clearForm(id)
    {
        form = el(id);
        for (i = 0; i < form.elements.length; i++)
        {
            e = form.elements[i];
            if (e.type == "text")
                e.value = "";
            else if (e.type == "select-one")
                e.selectedIndex = 0;
            else if (e.type == "checkbox")
                e.checked = false;
            else if (e.type == "radio")
                e.checked = e.defaultChecked;
        }
    }