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source: trunk/htdocs/index.php @ 211

Last change on this file since 211 was 211, checked in by MatthewWhiting, 16 years ago
Trialling out new login procedures, and implementing proprietry periods.
File size: 21.2 KB

Line
1	<?php session_start(); ?>
2	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html>
3	<?php
4	// index.php
5	// Matthew Whiting Nov 2007
6	// From the original by Albert Teoh
7	//
8	// The opening page for the ATNF Pulsar Data Archive
9	// system. Used to search for observation archive
10	// files.
11
12	// BEGIN Javascript for expansion blocks
13	// Thanks to:
14	// http://assn9.blogspot.com/
15	// Douglas Bowman
16	// URL: www.stopdesign.com
17	// Used in: http://www.bloggerforum.com/modules/newbb/viewtopic.php?topic_id=8725&forum=6
18	// Date: 26 Feb 2004
19	//
20
21	?>
22	<head>
23	<link rel="stylesheet" type="text/css" href="styles/style.css" />
24	<link rel="stylesheet" type="text/css" href="styles/query.css" />
25	<link rel="stylesheet" type="text/css" href="styles/results.css" />
26	<link rel="stylesheet" type="text/css" href="styles/atnf.css" />
27	<meta http-equiv="Content-Type" content="text/html; charset=iso-8759-1" />
28	<meta name="DC.Creator" lang="en" content="personalName=Teoh,Albert" />
29	<meta name="ATNF.Maintainer" content="contactName=Webmaster,the" />
30	<meta name="DC.Title.alt" lang="en" content="" />
31	<meta name="DC.Subject" lang="en" content="pulsar" />
32	<meta name="DC.Description" lang="en" content="Searches the data archives at the ATNF" />
33	<meta name="DC.Date.created" scheme="ISO8601" content="2002-12-12" />
34	<meta name="ATNF.Site" content="Marsfield" />
35	<meta name="ATNF.AccessPermission" content="Public" />
36	<meta name="ATNF.MetaVersion" content="1.0" />
37
38	<script type="text/javascript" src="scripts/atnf-oo-utils.js"></script>
39	<script type="text/javascript" src="scripts/atnf-string-utils.js"></script>
40	<script type="text/javascript" src="scripts/atnf-dom-utils.js"></script>
41	<script type="text/javascript" src="scripts/atnf-validation.js"></script>
42	<script type="text/javascript" src="scripts/atoa-query.js"></script>
43
44	<!--
45	<script type="text/javascript" src="scripts/atnf-dom-utils.js"></script>
46	<script type="text/javascript" src="scripts/atoa-query.js"></script>
47	<script type="text/javascript" src="scripts/process.js"></script>
48	-->
49
50
51	<script type="text/javascript" language="javascript1.2">
52
53	function toggleInstructions()
54	{
55	var div = document.getElementById( "divInstructions" ) ;
56	if ( div.style.display == 'none' \|\| div.style.display == '' )
57	div.style.display = "block" ;
58	else div.style.display = "none" ;
59	}
60
61	function togglecomments (id1,id2) {
62
63	var obj1 = document.getElementById(id1);
64	var obj2 = document.getElementById(id2);
65	(obj1.className=="commentshown") ? obj1.className="commenthidden" : obj1.className="commentshown";
66	(obj1.className=="commentshown") ? obj2.innerHTML="<< Hide" : obj2.innerHTML="Show all >>";
67
68	}
69
70	function checkAll(objName, FormName, FieldName ) {
71
72	var obj = document.getElementsByName(objName);
73	var CheckValue = obj[0].checked;
74
75	if(!document.forms[FormName])
76	return;
77	var objCheckBoxes = document.forms[FormName].elements[FieldName];
78	if(!objCheckBoxes)
79	return;
80	var countCheckBoxes = objCheckBoxes.length;
81	if(!countCheckBoxes)
82	objCheckBoxes.checked = CheckValue;
83	else
84	// set the check value for all check boxes
85	for(var i = 0; i < countCheckBoxes; i++)
86	objCheckBoxes[i].checked = CheckValue;
87	}
88
89	function updateSelectAll(objId, allId) {
90	var obj = document.getElementById(objId);
91	var allCheckbox = document.getElementById(allId);
92
93	if (!objId.checked && allCheckbox.checked) {
94	allCheckbox.checked = false;
95	}
96
97
98	}
99	</script>
100
101	</head>
102
103	<title>ATNF Pulsar Data Archive Home</title>
104
105	<!-- Start Content -->
106	<?php
107
108	include_once("constants.php");
109	include_once("security.php");
110	include_once("database.php");
111	include_once("date.php");
112
113	$now_day = date("j");
114	$now_month = date("n");
115	$now_year = date("Y");
116
117	$all_params_id = "all_params";
118	$all_others_id = "all_others";
119
120	$link = db_connect();
121
122	if(!$link){
123	include_once("header.html");
124
125	echo"<body class=\"atoa\">\n\n";
126
127	echo "<h1>ATNF Pulsar Data Archive</h1>\n\n";
128
129	echo "<b>\n The Archive is currently down for maintenance. <br>\n Please call again soon!. <br>\n</b>\n\n";
130
131	include_once("footer.html");
132
133	echo "\n</body>\n</html>\n";
134
135	exit;
136	}
137
138	//$link = db_connect_admin();
139	//loadNewTables();
140	//////////////////////////////
141	// Initialise error messages
142	//
143
144	$date_error = "";
145
146	///////////////////////////////////
147	// Find out the first and last dates
148	//$query = "select min(mjd), max(mjd) from ".OBSERVATIONS_TABLE;
149	$query = "select min(t.mjd), max(t.mjd) from ((select mjd from ".S70_TABLE.") union (select mjd from ".OBSERVATIONS_TABLE.")) as t";
150	$result = mysql_query($query) or die('Query 1 failed: ' . mysql_error());
151
152	$row = mysql_fetch_array($result);
153
154	$min_mjd = $row[0];
155	$max_mjd = $row[1];
156
157	// Convert from MJD to JD
158	$min_jd = $min_mjd + 2400000.5;
159	$max_jd = $max_mjd + 2400000.5;
160
161	// convert the mjd to a date
162	$min_jd = floor($min_jd);
163	$max_jd = ceil($max_jd);
164
165	$min_unix = jdtounix($min_jd);
166	$max_unix = jdtounix($max_jd);
167	$min_date_text = date("j F Y", $min_unix);
168	$max_date_text = date("j F Y", $max_unix);
169	$minDay = date("j",$min_unix);
170	$minMonth = date("n",$min_unix);
171	$minYear = date("Y",$min_unix);
172	$maxDay = date("j",$max_unix);
173	$maxMonth = date("n",$max_unix);
174	$maxYear = date("Y",$max_unix);
175
176	// Free resultset
177	mysql_free_result($result);
178
179	// Clear any old form inputs in session cache
180	init($link);
181
182	//////////////////////////////////////////////
183	// Get the field names to fill form checkboxes
184
185	$query = "SHOW COLUMNS FROM ".OBSERVATIONS_TABLE;
186	$result = mysql_query($query) or die ('Query 2 failed: ' . mysql_error());
187
188	$fields = array();
189	if (mysql_num_rows($result)) {
190	while($row = mysql_fetch_assoc($result)) {
191	if(($row['Field'] != "data_loc") && ($row['Field'] != "file_size_bytes"))
192	array_push($fields, $row);
193	}
194	}
195
196	$field_names = Array("filename" => "Filename",
197	"src_name" => "Source Name",
198	"project_id" => "Project ID",
199	"raj" => "RA (J2000, hh:mm:ss)",
200	"decj" => "Dec (J2000, dd:mm:ss)",
201	"data_type" => "Data Type",
202	"obsfreq" => "Frequency",
203	"bw" => "Bandwidth",
204	"scanlen" => "Scan Length",
205	"date" => "UT Date",
206	"ut" => "UT Time",
207	"MJD" => "MJD",
208	"rajd" => "RA (J2000, degs)",
209	"decjd" => "Dec (J2000, degs)",
210	"gl" => "Gal. Long. (degs)",
211	"gb" => "Gal. Lat. (degs)",
212	"BMAJ" => "Beamsize: BMAJ",
213	"BMIN" => "Beamsize: BMIN",
214	"BPA" => "Beam: BPA",
215	"dm" => "D.M.",
216	"period" => "Period",
217	"nchan" => "# channels",
218	"npol" => "# polarisations",
219	"nbin" => "# bins",
220	"nsub" => "# subintegrations",
221	"tsamp" => "Sample time",
222	"nbits" => "# bits per sample",
223	"nbeam" => "# beams",
224	"cnfg" => "Configuration",
225	"inst" => "Instrument",
226	"rcvr" => "Receiver",
227	"hdrver" => "PSRFITS version",
228	"survey" => "Survey name",
229	"telescope" => "Telescope",
230	"site" => "Site ID",
231	"obsrvr" => "Observer ID" );
232
233	///////////////////////////////////////////////
234	// Get the data types available in the database
235	//
236
237	//$query = "select distinct data_type from " . OBSERVATIONS_TABLE . " order by data_type";
238	$query = "(select distinct data_type from ".OBSERVATIONS_TABLE.") union (select distinct data_type from ".S70_TABLE.")";
239	$result = mysql_query($query) or die ('Query 3 failed: ' . mysql_error());
240
241	$data_types = array();
242
243	if (mysql_num_rows($result)) {
244	while($row = mysql_fetch_array($result, MYSQL_NUM)) {
245	array_push($data_types, $row[0]);
246	}
247	}
248
249	///////////////////////////////////////////////
250	// If the user clicked on the logout button
251	if (isset($HTTP_GET_VARS['command'])) {
252	$command = $HTTP_GET_VARS['command'];
253	if ($command == 'logout') {
254	//unset($_SESSION['auth_code']);
255	//unset($_SESSION['username']);
256	$_SESSION = array();
257	}
258	}
259
260	// If the user hasn't logged in before or if the previous
261	// session's authentication wasn't successful
262	// Then use the submitted username and password
263	if (!isset($_SESSION['auth_code']) \|\| $_SESSION['auth_code'] != OK) {
264	$username = $HTTP_POST_VARS["username"];
265	$password = $HTTP_POST_VARS["password"];
266	$auth_code = authenticate($username, $password);
267	}
268	else {
269	$auth_code = $_SESSION['auth_code'];
270	$username = $_SESSION['username'];
271	}
272
273	//echo "auth_code = $auth_code<br>\n";
274
275	///////////////////////////////////////////////////////////////
276	// Set the new maximum search range if not an atnf staff member
277	//
278
279	// if (!atnf_staff($username)) {
280	// $max_cal_assoc['day'] = date("j");
281	// $max_cal_assoc['month'] = date("n");
282	// $max_cal_assoc['year'] = date("Y")-2;
283
284	// echo "$username not atnf<br>\n";
285	// }
286
287	// Initial state where no username or password supplied OR bad login state
288	if ($auth_code != OK) { ?>
289	<body class="front_page">
290
291
292	<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
293
294	<img class="front_page" src="images/front_page01.png"></img>
295	<table class="login">
296	<?php if ( $auth_code == BAD_LOGIN){ ?>
297	<tr><td class="form_field" colspan="2"><font color="red">Incorrect username and/or password</font></td></tr>
298	<?php }?>
299	<tr><td class="form_field"><font color="white">Username: </font></td><td><input type="text" name="username"></td></tr>
300	<tr><td class="form_field"><font color="white">Password: </font></td><td><input type="password" name="password"></td></tr>
301	<tr><td class="form_field" align="left"><font color="white"><a href="register.html">Register</a></font></td><td align="right" rowspan="2"><input type="submit" value="Log in"></td></tr>
302	<tr><td class="form_field" align="left"><font color="white"><a href="forgot.php">Forgot your password?</a></font></td></tr>
303	</table>
304	</form>
305	<?php } else {
306	include_once("header.html");
307	$_SESSION['username'] = $username;
308	$_SESSION['auth_code'] = $auth_code;
309
310	$actions = $HTTP_GET_VARS['actions'];
311
312	if ($actions == "new_query") {
313	init();
314	}
315	else if ($actions == "error") {
316	$date_error = "You are only authorised to access data > 18 months old";
317	}
318	?>
319	<body class="atoa">
320
321	<h1>ATNF Pulsar Data Archive</h1>
322
323	<p>This archive provides access to pulsar observations taken at the Parkes radio telescope between the dates of <?php echo $min_date_text." and ".$max_date_text?>. <br>See the Users Guide link for more details. </p>
324
325	<table width="700" style="border: 0px;">
326	<tr align="center">
327	<td>
328	<a class="top_menu" href="<?php echo $PHP_SELF; ?>?command=logout">Logout</a>
329	<!--a href="login?_action=logout">Logout</a-->
330
331	</td>
332	<td>
333	<a class="top_menu" href="change_password.html?prev_page=<?php echo urlencode("index.php"); ?>">Change Password</a>
334	</td>
335	<td size="30">
336
337	</td>
338	<td>
339	<a href="#" onClick="toggleInstructions();return false;">Instructions</a>
340	</td>
341	<td size="30">
342
343	</td>
344	<td>
345	<a href="pulsar_archive_guide.html">Users Guide</a>
346	</td>
347	</tr>
348
349	</table>
350
351	<div id="divInstructions" style="display:none" >
352	<dl class="top">
353	<h2>Instructions</h2>
354	<dt> Display Parameters </dt>
355	<dd> Check the fields you want shown in the results table. Suggested columns are checked by default</dd>
356	<dd> The results can be ordered by one of the parameters in the "Order By" drop-down list</dd>
357	<dt> Coordinates </dt>
358	<dd> The sky position can be specified by a Pulsar name or a RA/Dec position.
359	The pulsar name takes precedence. The search radius must be given. </dd>
360	<dt> Filter Options </dt>
361	<dd> The date range can be specified - the defaults are the range of dates in the archive.</dd>
362	<dd> Either timing data (particular pulsar) or survey data can be specified. Or both! </dd>
363	<dd> The type of instrument can be specified. Default is any type.</dd>
364	<dd> More than one frequency band can be specified.
365	<dt> Display Other </dt>
366	<dd> Calibraton observations taken within a given time period of the queried observations can also be shown and downloaded. Check the box to do so, and specify the time interval. </dd>
367	</dl>
368	</div>
369
370
371
372	<!--<table class="noborder">
373	<tr><td><a class="top_menu" href="<?php echo $PHP_SELF; ?>?command=logout">Logout</a> \| <a class="top_menu" href="change_password.html?prev_page=<?php echo urlencode("index.php"); ?>">Change Password</a></td>
374	</tr>
375	</table>-->
376
377
378	<form action="query.php" method="GET" name="data_archive_form" id="data_archive_form">
379	<input type="hidden" name="state" value="results">
380
381
382
383
384	<table class="noborder" cellpadding=0>
385
386	<tr><td colspan=3>
387	<br>
388	<center><input type="submit" value="submit" name="submit_button" style="float: center;">
389	<input type="reset" value="reset" name="reset_button" style="float: center;"></center>
390	<br>
391	</td></tr>
392
393	<tr>
394
395	<!-- **************************** -->
396	<td valign="top" class="form_field" rowspan="1">
397
398	<fieldset>
399	<legend>DISPLAY PARAMETERS</legend>
400	<input type="checkbox" name="<?php echo $all_params_id; ?>" id="<?php echo $all_params_id; ?>" onClick="checkAll('<?php echo $all_params_id; ?>', 'data_archive_form', 'params[]')" >Select all<br>
401	<!--font size="-1"><a href="javascript:togglecomments('params', 'toggler1')" id="toggler1">Show all >></a></font--><br>
402	<!span class="commenthidden" id="params">
403	<div id="list">
404	<?php
405	$def_fields = Array( "filename", "src_name", "project_id", "raj", "decj",
406	"data_type", "obsfreq", "bw", "scanlen", "date", "ut" );
407
408	foreach ($fields as $field) {
409	echo "<input
410	onClick=\"updateSelectAll('".$field['Field']."', '$all_params_id')\" type=\"checkbox\" name=\"params[]\" value=\"".$field['Field']."\" id=\"".$field['Field']."\"";
411	if( in_array( $field['Field'], $def_fields ) )
412	echo ' checked="true"';
413	echo " >".$field_names[$field['Field']]."<br>\n";
414	}
415	?>
416	</div>
417	</span>
418	</fieldset>
419
420	</td>
421
422	<!-- **************************** -->
423
424	<td class="form_field" height="10%" rowspan="1">
425	<!-- Position Options -->
426
427	<table cellspacing=0 cellpadding=0 style="border: 0px;">
428	<tr><td>
429	<fieldset id="flsPosition">
430	<legend>POSITION REQUIREMENTS</legend>
431
432	<!-- Pulsar Name -->
433	<fieldset>
434	<legend>Pulsar Name</legend>
435	<input type="text" name="pulsar_name" size="20">
436	<br>
437	<p>Note that search-by-name takes precedence over search-by-RA/Dec.</p>
438	</fieldset>
439
440	<br>
441
442	<fieldset>
443	<legend>Right Ascension (J2000)</legend>
444
445	<input type="text" id="txtRAHour" name="rahour" size="3" tabindex="1" />
446	<label for="txtRAHour" class="coordinate"><abbr title="hours"><sup>h</sup></abbr></label>
447
448	<input type="text" id="txtRAMinute" name="ramin" size="3" tabindex="1" />
449	<label for="txtRAMinute" class="coordinate"><abbr title="minutes"><sup>m</sup></abbr></label>
450
451	<input type="text" id="txtRASecond" name="rasec" size="6" tabindex="1" />
452	<label for="txtRASecond" class="coordinate"><abbr title="seconds"><sup>s</sup></abbr></label>
453	</fieldset>
454
455	<fieldset>
456	<legend>Declination (J2000)</legend>
457
458	<input type="text" id="txtDecDegree" name="decdeg" size="3" tabindex="1" />
459	<label for="txtDecDegree" class="coordinate"><abbr title="degrees">°</abbr></label>
460
461	<input type="text" id="txtDecMinute" name="decmin" size="3" tabindex="1" />
462	<label for="txtDecMinute" class="coordinate"><abbr title="minutes">′</abbr></label>
463
464	<input type="text" id="txtDecSecond" name="decsec" size="6" tabindex="1" />
465	<label for="txtDecSecond" class="coordinate"><abbr title="seconds">″</abbr></label>
466	</fieldset>
467
468	<br>
469	<br>
470	</fieldset>
471
472	<fieldset id="flsSearchRadius">
473	<legend>SEARCH WINDOW [arcmin]</legend>
474	<input type="text" id="txtSearchWindow" name="radius" size="20" tabindex="1" value="60"/>
475	</fieldset>
476
477	<br>
478	<fieldset id="flsProjectID">
479	<legend>PROJECT ID</legend>
480	<input type="text" id="txtSearchWindow" name="projID" size="20" tabindex="1" value=""/>
481	</fieldset>
482
483	</td></tr>
484	</table>
485	</td>
486
487	<!-- **************************** -->
488
489	<td class="form_field" height="10%">
490	<!-- Filter Options -->
491	<table cellspacing=0 cellpadding=0 style="border: 0px;">
492	<tr><td>
493	<fieldset id="flsObsDate">
494
495	<legend>FILTER OPTIONS</legend>
496	<br>
497
498	<!-- Date range -->
499	<fieldset>
500	<legend>Date Range</legend>
501
502	From:
503	<select name="from_day">
504	<?php
505	for ($i = 1; $i <= 31; $i++) {
506	echo "\t\t\t<option";
507	if ($i == $minDay) { echo " selected"; }
508	echo " value=\"$i\">$i</option>\n";
509	}
510	?>
511	</select>
512	<select name="from_month">
513	<?php
514	$monthlist = cal_info(0);
515	for ($i = 1; $i <= 12; $i++) {
516	echo "\t\t\t<option";
517	$month = $monthlist[abbrevmonths][$i];
518	if ($i == $minMonth) { echo " selected"; }
519	echo " value=\"$i\">$month</option>\n";
520	}
521	?>
522	</select>
523	<!-- <input type="text" size="4" name="from_year" value="<?php echo $min_cal_assoc['year']; ?>"> -->
524	<select name="from_year">
525	<?php
526	for ($i = $minYear; $i <= $maxYear; $i++) {
527	echo "\t\t\t<option";
528	if ($i == $minYear) { echo " selected"; }
529	echo " value=\"$i\">$i</option>\n";
530	}
531	?>
532	</select>
533	<?php echo "<font size=\"-1\" color=\"red\">$date_error</font>" ?>
534	&nbsp To:
535	<select name="to_day">
536	<?php
537	for ($i = 1; $i <= 31; $i++) {
538	echo "\t\t\t<option";
539	if ($i == $maxDay) { echo " selected"; }
540	echo " value=\"$i\">$i</option>\n";
541	}
542	?>
543	</select>
544	<select name="to_month">
545	<?php
546	for ($i = 1; $i <= 12; $i++) {
547	echo "\t\t\t<option";
548	$month = $monthlist[abbrevmonths][$i];
549	if ($i == $maxMonth) { echo " selected"; }
550	echo " value=\"$i\">$month</option>\n";
551	}
552	?>
553	</select>
554	<!-- <input type="text" size="4" name="to_year" value="<?php echo $max_cal_assoc['year']; ?>"> -->
555	<select name="to_year">
556	<?php
557	for ($i = $minYear; $i <= $maxYear; $i++) {
558	echo "\t\t\t<option";
559	if ($i == $maxYear) { echo " selected"; }
560	echo " value=\"$i\">$i</option>\n";
561	}
562	?>
563	</select>
564	</fieldset>
565
566	<br>
567	<!-- Obs Mode -->
568	<fieldset>
569	<legend>Obs Mode</legend>
570
571	<select name="obs_mode" onchange="ObsModeChanged()" id="ObsModeList">
572	<option value="any"> Any </option>
573	<option value="timing"> Only timing data </option>
574	<option value="search"> Only search data </option>
575	</select>
576	</fieldset>
577
578	<!-- Data Type -->
579	<fieldset>
580	<legend>Data Type</legend>
581
582	<select name="data_type">
583	<option value="" selected> Any </option>
584	<?php
585	foreach ($data_types as $data_type) {
586	echo "
587	<option value=\"$data_type\"> $data_type </option>";
588	}
589	?>
590	</select>
591	</fieldset>
592
593	<!-- Frequency band -->
594	<fieldset>
595	<legend>Band Name</legend>
596	<select id="selBand" name="bandname[]" multiple="multiple" size="5">
597	<option value="anyBand" selected="selected">Any</option>
598	<option value="70cm" >70cm (~0.44 GHz)</option>
599	<option value="50cm" >50cm (~0.66 GHz)</option>
600	<option value="20cm">20/18cm (1.2-1.8 GHz)</option>
601	<option value="13cm" >13cm (2.0-2.5 GHz)</option>
602	<option value="10cm" >10cm (2.6-3.6 GHz)</option>
603	<option value="6cm" >6cm (4.5-5.1 GHz)</option>
604	<option value="5cm" >5cm (5.9-6.8 GHz)</option>
605	<option value="3cm" >3cm (8.1-8.6 GHz)</option>
606	<option value="1.3cm" >1.3cm (21.-24. GHz)</option>
607	</select>
608	</fieldset>
609
610	</fieldset>
611	</td></tr>
612	<tr><td>
613	<fieldset>
614	<legend>ORDER RESULTS BY</legend>
615	<table cellspacing="0px" cellpadding="0px" style="border: 0px;">
616	<tr><td>
617	<select name="orderBy" id="OrderByList">
618	<option selected value="distance">Distance
619	<option value="date">Date
620	<option value="obsfreq">Frequency
621	<option value="filename">Filename
622	</select>
623	</td><td>
624	<input type="radio" name="orderDir" id="orderDirectionSel" checked value="asc">Ascending
625	<br>
626	<input type="radio" name="orderDir" id="orderDirectionSel" value="desc">Descending
627	</td></tr>
628	</table>
629	<br>
630	</fieldset>
631	</td></tr>
632	<tr><td>
633	<fieldset>
634	<legend>DISPLAY OTHER DATA</legend>
635
636	<input type="checkbox" name="cals" value="cals" id="cals" checked="true" />
637	Display Cals taken within
638	<input type="text" name="cals_within_mins" value="30" maxlength="5" size="3"/>
639	mins of Observations
640	<br>
641
642	</fieldset>
643	</td></tr>
644	</table>
645	<br>
646	</td>
647	</tr>
648	</table>
649
650
651	</form>
652	<div style="min-height: 20px; max-height: 1000px;"> </div>
653	<?php
654	include "footer.html";
655	}?>
656
657	</body>
658
659	</html>
660
661
662	<?php //////////// Function definitions ///////////////
663
664
665	// Initialise the input form variables. If the "New query" button is clicked
666	// no argument is passed to init(), hence the need for a default NULL value
667	// because there is no need for updating user access statistics
668	function init($link=NULL) {
669
670	if ($link) {
671	// Update the users table
672	updateUsersTable($link);
673	}
674
675	unset($_SESSION['cals']); // The result set of cals
676	unset($_SESSION['obs']); // The result set of observations
677	//unset($_SESSION['cart_items']); // The result set of observations
678	}
679
680	mysql_close($link);
681
682	?>

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