<h3>Item Specification</h3>
<?php
$tbl = "st_items";

$id = $_REQUEST["id"];
$code = $_POST["code"];
$description = $_POST["description"];
$category = $_REQUEST["category"];
$subcategory = $_REQUEST["subcategory"];
$dated = date("Y-m-d");

if ($_POST["submit"] == 'SAVE') {
	if (mysql_num_rows(mysql_query("select * from $tbl where id=$id"))) {
		mysql_query("update $tbl set code='$code',description='$description',subcategory=$subcategory,category=$category,loginID='$user' 
		where id=$id");
	} else {
        mysql_query("insert into $tbl(code,description,subcategory,category,loginID) 
		values('$code','$description',$subcategory,$category,'$user')");
	}
} if ($_POST["submit"] == 'DELETE') {
	mysql_query("delete from $tbl where id=$id");
}

echo "Select category <select name='category' onchange=\"javascript: document.location.href='?pg=$pg&category='+this.value\">
<option value=''></option>";

$rs = mysql_query("select id,code from st_category order by code");
while ($o = mysql_fetch_object($rs)) {
        echo "<option value='$o->id'";
        if ($o->id == $category) echo " selected";
        echo ">$o->code</option>";
}

echo "</select> 
item <select name='subcategory' onchange=\"javascript: document.location.href='?pg=$pg&category=$category&subcategory='+this.value\">
<option value=''></option>";

$rs = mysql_query("select id,code,item_type from st_subcategory where category=$category order by code");
while ($o = mysql_fetch_object($rs)) {
        echo "<option value='$o->id'";
        if ($o->id == $subcategory) echo " selected";
        echo ">$o->code ($o->item_type)</option>";
}

echo "</select>
<br><br><center>";

if ($category && $subcategory) {
	echo "<table width='80%' border='1' style='border-collapse: collapse'>
	<tr><th>No</th><th>Code</th><th>Specification (Make/model etc.)</th><th>Dated</th></tr>
	<tr><td><a name='new'>+</a></td>";
	if (!$id) {
		echo "<td><input type='text' name='code' size='30' value=''></td>
		<td><input type='text' name='description' size='50' value=''></td>
		<td>$dated<input type='hidden' name='id' value='0'></td></tr>
		<tr><th colspan='4'><input type='submit' name='submit' value='SAVE'></th>";
	} else {
        echo "<td colspan='3'><a href='?pg=$pg&category=$category&subcategory=$subcategory&id=#new'>Item</a></td>";
	}
	echo "</tr>";
	
	//existing records
	$rs = mysql_query("select * from $tbl where category=$category and subcategory=$subcategory order by code");
	while ($o = mysql_fetch_object($rs)) {
		$i++;
		$j = $i - 2;
		echo "<tr><td><a name='$i' href='?pg=$pg&id=$o->id&category=$category&subcategory=$subcategory#$j'>$i</a></td>";
		if ($o->id == $id) {
			echo "<td><input type='text' name='code' size='30' value='$o->code'></td>
			<td><input type='text' name='description' size='50' value='$o->description'></td>
			<td>$dated<input type='hidden' name='id' value='$o->id'></td></tr>
			<tr><th colspan='3'><input type='submit' name='submit' value='SAVE'></th>
			<th><input type='submit' name='submit' value='DELETE'></th>";
		} else {
			echo "<th>$o->code</th><td>$o->description</td><td>$o->dateCreation</td>";
		}
		echo "</tr>";
	}
	echo "</table>";
}
?>

</center>