I’ve written the following codes. The idea is to pass the selected value of “Reports per page” into javascript pagination functions to display the pages accordingly.
Problem: value seemingly passed correctly but pages not displaying properly. E.g. value for “reports per page” = 2. But instead of displaying 2 reports per page, all/total reports were displayed and 2 reports were deducted when “NEXT” is clicked each time / moving from page 1 to 2, etc.
Can anyone advise what is wrong with my codes? Thanks!
<table>
<tr>
<td><label id="lDisplayPerPg" for="lDisplayPerPg">Reports per page</label>
<select name="listDisplayPerPg" id="listDisplayPerPg">
<option value="2" selected="selected">2</option>
<option value="4">4</option>
<option value="6">6</option>
<option value="8">8</option>
</select></td>
</tr>
</table>
<form method="post" action="">
<table id="tadminViewReport" border="0" width="960px" cellpadding="0" cellspacing="0">
<tr>
<th width="15%">Username</th>
<th width="15%">Report ID</th>
<th width="40%">Report Title</th>
<th width="20%">Date submitted</th>
<th width="10%">Status</th>
</tr>
<tr>
<td>username1</td>
<td>reportID1</td>
<td class="reportDoc">Document 1</td>
<td>Date 1</td>
<td><a href="admin_report_details.html">Received</a></td>
</tr>
<tr>
<td>username2</td>
<td>reportID2</td>
<td class="reportDoc">Document 2</td>
<td>Date 2</td>
<td><a href="admin_report_details.html">In Queue</a></td>
</tr>
<tr>
<td>username3</td>
<td>reportID3</td>
<td class="reportDoc">Document 3</td>
<td>Date 3</td>
<td><a href="admin_report_details.html">Completed</a></td>
</tr>
<tr>
<td>username4</td>
<td>reportID4</td>
<td class="reportDoc">Document 4</td>
<td>Date 4</td>
<td><a href="admin_report_details.html">In Queue</a></td>
</tr>
<tr>
<td>username5</td>
<td>reportID5</td>
<td class="reportDoc">Document 5</td>
<td>Date 5</td>
<td><a href="admin_report_details.html">In Queue</a></td>
</tr>
<tr>
<td>username6</td>
<td>reportID6</td>
<td class="reportDoc">Document 6</td>
<td>Date 6</td>
<td><a href="admin_report_details.html">Completed</a></td>
</tr>
<tr>
<td>username7</td>
<td>reportID7</td>
<td class="reportDoc">Document 7</td>
<td>Date 7</td>
<td><a href="admin_report_details.html">Completed</a></td>
</tr>
<tr>
<td>username8</td>
<td>reportID8</td>
<td class="reportDoc">Document 8</td>
<td>Date 8</td>
<td><a href="admin_report_details.html">Received</a></td>
</tr>
<tr>
<td>username9</td>
<td>reportID9</td>
<td class="reportDoc">Document 9</td>
<td>Date 9</td>
<td><a href="admin_report_details.html">Received</a></td>
</tr>
<tr>
<td>username10</td>
<td>reportID10</td>
<td class="reportDoc">Document 10</td>
<td>Date 10</td>
<td><a href="admin_report_details.html">Received</a></td>
</tr>
</table>
<div id="pageNavPosition"></div>
<br />
</form>
<script type="text/javascript"><!--
reportsPerPage = listDisplayPerPg.options[listDisplayPerPg.selectedIndex].value;
var pager = new Pager('tadminViewReport', reportsPerPage);
pager.init();
pager.showPageNav('pager', 'pageNavPosition');
pager.showPage(1);
//--></script>
function Pager(tableName, itemsPerPage) {
//function Pager(tableName, itemsPerPage) {
this.tableName = tableName;
// this.itemsPerPage = itemsPerPage;
this.currentPage = 1;
this.pages = 0;
this.inited = false;
this.showRecords = function(from, to) {
var rows = document.getElementById(tableName).rows;
// i starts from 1 to skip table header row
for (var i = 1; i < rows.length; i++) {
if (i < from || i > to)
rows[i].style.display = 'none';
else
rows[i].style.display = '';
}
}
this.showPage = function(pageNumber) {
if (! this.inited) {
alert("not inited");
return;
}
var oldPageAnchor = document.getElementById('pg'+this.currentPage);
oldPageAnchor.className = 'pg-normal';
this.currentPage = pageNumber;
var newPageAnchor = document.getElementById('pg'+this.currentPage);
newPageAnchor.className = 'pg-selected';
var from = (pageNumber - 1) * itemsPerPage + 1;
var to = from + itemsPerPage - 1;
this.showRecords(from, to);
var pgNext = document.getElementById(this.pagerName + 'pgNext');
var pgPrev = document.getElementById(this.pagerName + 'pgPrev');
if (pgNext != null) {
if (this.currentPage == this.pages) pgNext.style.display = 'none';
else pgNext.style.display = '';
}
if (pgPrev != null) {
if (this.currentPage == 1) pgPrev.style.display = 'none';
else pgPrev.style.display = '';
}
}
this.prev = function() {
if (this.currentPage > 1)
this.showPage(this.currentPage - 1);
}
this.next = function() {
if (this.currentPage < this.pages) {
this.showPage(this.currentPage + 1);
}
}
this.init = function() {
var rows = document.getElementById(tableName).rows;
var records = (rows.length - 1);
this.pages = Math.ceil(records / itemsPerPage);
this.inited = true;
}
this.showPageNav = function(pagerName, positionId) {
if (! this.inited) {
alert("not inited");
return;
}
var element = document.getElementById(positionId);
var pagerHtml = '<span id="' + pagerName + 'pgPrev" onclick="' + pagerName + '.prev();" class="pg-normal"> « Prev </span> ';
for (var page = 1; page <= this.pages; page++)
pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> ';
pagerHtml += '<span id="' + pagerName + 'pgNext" onclick="'+ pagerName+'.next();" class="pg-normal"> Next »</span>';
element.innerHTML = pagerHtml;
}
}
I got it works http://pastebin.com/FKpKWdMM
Basically this is the only change..
change it to:
If you don’t know how to use Chrome Developers Tool / Firebug to debug javascript, I would strongly recommend you to learn that. That’s one skill that is super useful!