Ajax

Dear List -

I think we have to revisit this.

The object is to click on an element of a table [name field] and 
retrieve the customer number[number field] send th eresult as an Ajax 
call to a callback function as a json string, and get back the customer 
number as a PHP variable.

Code snippits:
Start:
<div id="e1">

Table:

     $results = "<table border=4 cellpadding=5 cellspacing=55  rules=all 
frame=box style='table-layout:fixed;'>";
     $results .= "<tr><th>Name</th><th>Number</th></tr>";
     // generate a table here
     for($i=0; $i<10; $i++)
     {
         $k = $i ;
         $results .= "<tr><td id='name$i' >$names[$k] </td><td  
id='nums$k'>$nums[$k]</td></tr>";

     }
     $results = "<table border=4 cellpadding=5 cellspacing=55  rules=all 
frame=box style='table-layout:fixed;'>";
     $results .= "<tr><th>Name</th><th>Number</th></tr>";
     }
     $results .= "</table>";
     $results;

retrieve number:

<script type="text/javascript">
     var cusn;
     $(document).ready(function(){
         $("#e1").click(function() {
             cusn = $(this).attr('id');
             alert(cusn); // this always returns e1
         });
     });
</script>


  Ajax Call

<script type="text/javascript">
     $(document).ready(function(){
             $("#e1").dblclick(function(e) {
                  $.post("testClickcallback.php",
                    {"custnum":cusn},  function getCustNo(id)
         {
             cno = 'cust'+id;
             cnm = "name"+id;
             cname = document.getElementById(cnm).innerHTML;
             cnum = document.getElementById(cno).innerHTML;
         alert("For customer "+cname+" the number is "+cnum);
             return;
         }
//    alert("subval");
   //alert(subval);

   ,"html");
});

});

</script>

// receive error: document.getElementById(...) is null

Callback function:

<?php
$json = Array();
$json['custnum'] =  $_POST['cusn'];
echo json_encode($json);
?>

//response:

|
||Notice: Undefined index: cusn in /var/www/testClickcallback.php on line 5
||
||Call Stack:
||     0.0005     126856   1. {main}() /var/www/testClickcallback.php:0
||
||
||Variables in local scope (#1):
||   $json = array ()
||
||{"custnum":null}

Now what??|||||

Ethan


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