How to assign a variable in jquery to PHP. I can't do it for half a day.

$ ('. Sendj '). Click (function () {
var len = $ ("#group span"). Size ();//Gets the number of span tags
var arr = [];
for (var index = 0; index < 5; index++) {//Create a numeric array
Arr[index] = index;
}
var a_inter=[];
$.each (arr, function (i) {//loop to get different ID values
var idvalue = $ ("li.selected"). EQ (i). attr ("id");
if (idvalue! = ") {
A_inter[i]=idvalue;
}
});
D=a_inter.tostring ();//change an array to a string

$.post ("getselect.php", {selectdata:d},function (data) {

});
});
This is the D.

Reply to discussion (solution)

$.post ("getselect.php", {selectdata:d},function (data) .....
You this is submitted

$.post ("getselect.php", {selectdata:d},function (data) {  alert (data);});

getselect.php

 
  
  getselect.php  need to use   
  It seems to be the problem of the environment. Toss a day.
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