[jQuery] Select all controls of the form

[JQueryProgrammer]

I am trying to validate all the controls that exist in the form. My
form code looks like:

<form id="form1">
        <input type="text" id="txt1" name="txt1" />
        <br/>
        <textarea name="txtArea" id="txtArea" cols="100" rows="4" />
        <br/>
        <select id="sel1" name="sel1" style="width: 250px;" >
                <option value="">Select</option>
                <option value="1">One</option>
                <option value="2">Two</option>
                <option value="3">Three</option>
        </select>
        <br/>
        <input type="radio" id="rdo1" name="rdo1"
value="Option1">&nbsp;Option 1&nbsp;
        <br/>
        <input type="radio" id="rdo2" name="rdo1"
value="Option2">&nbsp;Option 2&nbsp;
        <br/>
        <button id="btn1">Submit</button>
        <button id="btn2">Reset</button>
</form>

I want to select only the controls of the form viz: textbox, textarea,
select, radio & button (Total 7). I am trying to extract them as

$("#form1 *").each(function() {
     alert($("#+this").attr("id"));
})

it gives me total 16 alerts. I want just 7. Any help..?