How do I send these Jquery Variables off to Mysql via php?

I made a simple (yet unconventional) form which stores each answer as a variable (I did it this way because some questions won't be answered because some questions showing up depend on what you answered on the previous question).

I would like to send that off to a php file which will search if there's a match in a Mysql database, and return it in an xml format.

Here are the variables:

• Answer1: If filled, must equal to what is in mysql
• Checkbox1/2/3/3: Will retrieve data if one or more of these is checked. For example, if 'coffee' and 'juice' is checked, rows that have either coffee or juice set to true will be returned.
• Dropdown1/2: Two from/to variables that specify a range

Here is my code :) http://jsfiddle.net/pufamuf/S6smg/1/

HTML:

<div id="que1">Question One:
    <input id="inp1" type="text">
    <input type="button" value="Next Question" id="but1"></div>

<div id="que2" class="hiddendiv">Question Two:<br>
    <input type="checkbox" id="checkbox1" value="coffee">Coffee<br>
    <input type="checkbox" id="checkbox2" value="tea">Tea<br>
    <input type="checkbox" id="checkbox3" value="latte">Latte<br>
    <input type="checkbox" id="checkbox4" value="juice">Juice<br>
    <input type="button" value="Next Question" id="but2"></div>

<div id="que3" class="hiddendiv">Question Three:
    From:
    <select id="dropdown1">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    </select>
    To:
    <select id="dropdown2">
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    </select>
    <input type="button" value="Finish" id="but3"></div>

<br><br><br>
<b>Variables</b><br>
Answer1:<div id="answer1"></div>
Checkbox1:<div id="answer2a"></div>
Checkbox2:<div id="answer2b"></div>
Checkbox3:<div id="answer2c"></div>
Checkbox4:<div id="answer2d"></div>
Dropdown1:<div id="answer3a"></div>
Dropdown2:<div id="answer3b"></div>

Jquery:

$("input[type='button']").click(function() {
    var question1 = '';
    var question2a = '';
    var question2b = '';
    var question2c = '';
    var question2d = '';
    var question3a = '';
    var question3b = '';
    switch (this.id) {
    case 'but1':
        question1 = $("#inp1").val();
        $("#answer1").html(question1);
        $('#que1').addClass('hiddendiv');
        $('#que2').removeClass('hiddendiv');
    break;
    case 'but2':
        if($('#checkbox1').is(':checked')){
        question2a = '1';
        }
        if($('#checkbox2').is(':checked')){
        question2b = '1';
        }
        if($('#checkbox3').is(':checked')){
        question2c = '1';
        }
        if($('#checkbox4').is(':checked')){
        question2d = '1';
        }
        $("#answer2a").html(question2a);
        $("#answer2b").html(question2b);
        $("#answer2c").html(question2c);
        $("#answer2d").html(question2d);
        $('#que2').addClass('hiddendiv');
        $('#que3').removeClass('hiddendiv');
    break;
    case 'but3':
        question3a = $("#dropdown1").val();
        question3b = $("#dropdown2").val();
        $('#que3').addClass('hiddendiv');
        $("#answer3a").html(question3a);
        $("#answer3b").html(question3b);
    break;
}
});

Thank you very much everyone :)))!

Here's what the php file looks like now for my older html form:

<?php
require("db_access.php");

function parseToXML($htmlStr) 
{ 
$xmlStr=str_replace('<','&lt;',$htmlStr); 
$xmlStr=str_replace('>','&gt;',$xmlStr); 
$xmlStr=str_replace('"','&quot;',$xmlStr); 
$xmlStr=str_replace("'",'&#39;',$xmlStr); 
$xmlStr=str_replace("&",'&amp;',$xmlStr); 
return $xmlStr; 
} 

$name=$_POST['name'];
$address=$_POST['address'];
$type=$_POST['type'];


// Opens a connection to a MySQL server
$connection=mysql_connect (localhost, $username, $password);
if (!$connection) {
  die('Not connected : ' . mysql_error());
}

// Set the active MySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
  die ('Can\'t use db : ' . mysql_error());
}




// Select all the rows in the markers table
$inputs = array('name', 'address', 'type');
$where  = array();

foreach($inputs as $input)
{
    if(!empty($_POST[$input])) {
        $where[] = "{$input} = '" . mysql_real_escape_string($_POST[$input]) . "'";
    }
}

if ($where) {
    $query = 'SELECT * FROM markers WHERE ' . implode(' AND ', $where);
} else {
    user_error("No rows returned by:<br />\n$query"); 
}
$result = mysql_query($query);
if($result == false) {
   die(mysql_error() . "<br />\n$query");
}
if(mysql_num_rows($result) == 0) {
   user_error("No rows returned by:<br />\n$query");
} 

header("Content-type: text/xml");

// Start XML file, echo parent node
echo '<markers>';

// Iterate through the rows, printing XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
  // ADD TO XML DOCUMENT NODE
  echo '<marker ';
  echo 'name="' . parseToXML($row['name']) . '" ';
  echo 'address="' . parseToXML($row['address']) . '" ';
  echo 'type="' . parseToXML($row['type']) . '" ';
  echo 'lat="' . $row['lat'] . '" ';
  echo 'lng="' . $row['lng'] . '" ';
  echo '/>';
}

// End XML file
echo '</markers>';

?>