01.
<script>
02.
function
findproduct_current(str)
03.
{
04.
if
(str.length == 0) {
05.
document.getElementById(
"product_qty"
).innerHTML =
""
;
06.
return
;
07.
}
else
{
08.
var
xmlhttp =
new
XMLHttpRequest();
09.
xmlhttp.onreadystatechange =
function
() {
10.
if
(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
11.
document.getElementById(
"product_qty"
).value = xmlhttp.responseText;
12.
var
qty= xmlhttp.responseText;
13.
14.
}
15.
}
16.
xmlhttp.open(
"GET"
,
"find_product.php?id="
+str, true);
17.
xmlhttp.send();
18.
findunit(str);
19.
}
20.
}
21.
</script>
22.
23.
24.
<input name=
"product_id"
id=
"product_id"
required=
"required"
class
=
"form-control"
onchange=
"findproduct_current(this.value)"
>
25.
<option value=
""
>
26.
</option>
27.
<?php
28.
$sqld
=
" select * from tb_product"
;
29.
if
(isset(
$_GET
[
'product_id'
]))
30.
{
31.
$product_id
=
$_GET
[
'product_id'
];
32.
$sqld
.=
" where"
;
33.
$sqld
.=
" product_id='$product_id'"
;
34.
}
35.
$resultd
=
$cls_con
->select_base(
$sqld
);
36.
while
(
$rowd
=mysqli_fetch_array(
$resultd
))
37.
{
38.
$product_id
=
$rowd
[
'product_id'
];
39.
$pro_name
=
$rowd
[
'pro_name'
];
40.
?>
41.
<option value=
"<?=$product_id;?>"
>
42.
<?=
$pro_name
;?>
43.
</option>
44.
<?php } ?>
45.
</div>
46.
</div>
47.
<div
class
=
"form-group"
>
48.
<label
for
=
"product_qty"
class
=
"col-sm-2 control-label"
>จำนวนสินค้า</label>
49.
<div
class
=
"col-sm-10"
>
50.
<input type=
"text"
class
=
"form-control"
name=
"product_qty"
id=
"product_qty"
readonly placeholder=
"จำนวนสินค้าปัจจุบัน"
>
51.
</div>
52.
</div>