using the checkbox component

i need help i am making a flash form that sends variables to a php script and the php script mails it to me. What i need help with is how to get the checkbox component i am using to when clicked sets a variable so i can send it to my php script. For something that is supposed to be so easy components are annoyingly hard to use.

Thanks guys the is the best flash help site i have ever used.

on stage -two checkboxes - instance names - cb1 and cb2
a button - instance name - btn_sendMail

Code:

---

cb1.label = "Bananas";

o_cb1 = new Object();
o_cb1.click = function(obj){
sel_1 = obj.target.selected;
lab_1 = obj.target.label;
trace(lab_1+"/"+sel_1);
};
cb1.addEventListener("click", o_cb1);

/////////////////////////////////////

cb2.label = "Oranges";

o_cb2 = new Object();
o_cb2.click = function(obj){
sel_2 = obj.target.selected;
lab_2 = obj.target.label;
trace(lab_2+"/"+sel_2);
};
cb2.addEventListener("click", o_cb2);

/////////////////////////////////////

btn_sendMail.onRelease = function(){
lv = new LoadVars();
if(sel_1) lv.selection1 = lab_1;
if(sel_2) lv.selection2 = lab_2;
trace(lv);
lv.onLoad = function(){ trace(unescape(this)); };
lv.sendAndLoad("path to php",lv,"POST");
};

/*--add to your php --
<?php
$selection1 = $_POST['selection1'];
$selection2 = $_POST['selection2'];
......
......
The visitor would like a quote on the following:
------------------------------------------------------
$selection1
$selection2
......
?>
*/

---