Archive for the 'jQuery' Category

Simple jQuery Accordion

Published
by
ethan
on February 26, 2010
in CSS, Source and jQuery
. 0 Comments

I spent an hour trying to get the jQuery UI accordion to work and it just wasn’t right. So I wrote my own. And then, the next day, I made it simpler.

Get the files here.

Automatic Highslide

Published
by
ethan
on February 19, 2010
in JavaScript and jQuery
. 0 Comments

Assumes you are familiar with jQuery and Highslide…

// prep "a img" for highslide
$('a').each(function() {
  if ($(this).children('img').length > 0) {
    $(this).addClass('highslide');
    this.onclick = function() {	return hs.expand(this); }
  }
});

jQuery Logo Rotator/Slider

Published
by
ethan
on October 8, 2009
in JavaScript, Source and jQuery
. 0 Comments

For a client’s site, we had some partner logos in the lower left corner. Rather than let them take up a lot of space, we decided to have them rotate. Here’s the HTML.

<div id="partners">
	<a href="http://www.nationalgrid.com" target="_blank"><img src="/wp-content/themes/CEG/images/footer_logos/botlogosNATGRID.gif" alt="National Grid" /></a>
	<br />
	<a href="http://www.nystar.state.ny.us/" target="_blank"><img src="/wp-content/themes/CEG/images/footer_logos/botlogosNYSTAR.gif" alt="NYSTAR" /></a>
	<br />
	<a href="http://www.mep.nist.gov/" target="_blank"><img src="/wp-content/themes/CEG/images/footer_logos/botlogosMEP.gif" alt="NIST/MEP" /></a>
	<br />
	<a href="http://www.nist.gov/" target="_blank"><img src="/wp-content/themes/CEG/images/footer_logos/botlogosNIST.gif" alt="NIST/MEP" /></a>
	<br />
</div>

And here’s the jQuery.

var imageFader;
 
$(document).ready(function() {
  // get the images in the lower left going
  $('#partners').each(function() {
    $(this).children('br').hide();
 
    var speed = 1500;
    var pause = 5000;
    var next = 1;
    var counter = 0;
 
    // how many images are there?
    var max = $(this).children('a').length;
 
    $(this).children('a:gt(0)').hide();
 
    function fadeImages() {
      if (counter >= max) counter = 0;
      next = counter + 1;
      if (next >= max) next = 0;
 
      $("#partners").children('a:eq(' + counter.toString() + ')').slideUp(speed, function() {
        $("#partners").children('a:eq(' + next.toString() + ')').slideDown(speed);
      });
 
      counter++;
    } // end function fadeImages
 
    imageFader = setInterval(fadeImages, pause); 
  });
});

jQuery Show/Hide for Wordpress Sidebar Widgets

Published
by
ethan
on November 24, 2008
in Source, Wordpress and jQuery
. 0 Comments

Here’s some handy jQuery code to show/hide menu items in Wordpress’s sidebar.

function sidebarHide(element) {
	// this function hides the ul
	// also calls sidebarPlus
	$('#sidebar ul ' + element +' ul').each(function() {
		$(this).hide('fast');
	});
	sidebarPlus(element);
	return false;
}
function sidebarShow(element) {
	// this function shows the ul
	// also calls sidebarMinus
	$('#sidebar ul ' + element +' ul').each(function() {
		$(this).show('fast');
	});
	sidebarMinus(element);
	return false;
}
function sidebarPlus(element) {
	// function appends a + to the title
	// this plus is a link to show the contents
	$('#sidebar ul ' + element + ' h2').each(function() {
		var text = $(this).text();
		var plus = text.lastIndexOf(" -");
		if (plus > 0) {
			text = text.substring(0, plus);
		}
		var link = '<a href="#" onclick="return sidebarShow(\'' + element + '\');">' + text + ' +</a>';
		$(this).html(link);
	});	
}
function sidebarMinus(element) {
	// function appends a - to the title
	// this minus is a link to hide the contents
	$('#sidebar ul ' + element + ' h2').each(function() {
		var text = $(this).text();
		var minus = text.lastIndexOf(" +");
		if (minus) {
			text = text.substring(0, minus);
		}
		var link = '<a href="#" onclick="return sidebarHide(\'' + element + '\');">' + text + ' -</a>';
		$(this).html(link);
	});	
}
 
 
$(document).ready(function() {
 
	$('#sidebar ul li').each(function() {
		var n = $(this).attr('id');
		if (n != '') {
			sidebarHide('#' + n);
		}
	});
 
});

DIVs That Are The Same Height As The Browser Window

Published
by
ethan
on August 8, 2008
in Source, jQuery and xHTML
. 0 Comments

Common problem when building web pages. You want a DIV that’s the same height as the browser window, but you don’t know what the height of the browser window is. It changes from user to user. Well, jQuery to the rescue.

var browser_window_height = 0;
 
$(document).ready(function() {
 
	// this sets the height of the div on init
	$('#fullscreen').each(
 
		function() {
 
			browser_window_height = $(window).height();
			$('#info').text(browser_window_height.toString());
 
			$(this).css('height', browser_window_height.toString() + 'px');
 
		}
 
	);
 
	// this says, if they resize the window, change the height of the div
	$(window).resize(function() {
 
		var new_browser_window_height = $(window).height();
 
		if (new_browser_window_height < browser_window_height) {
			// if the new window size is smaller, resize quickquickquick
			$('#fullscreen').css('height', new_browser_window_height.toString() + 'px');
		} else {
			$('#fullscreen').animate({
				'height' : new_browser_window_height.toString() + 'px'
			}, "slow");
		}
 
		browser_window_height = new_browser_window_height;
 
		$('#info').text(browser_window_height.toString());
 
	});
 
});

View the page (and full source) here.

Fancy Shmancy Tables

Published
by
ethan
on July 30, 2008
in CSS, Source, jQuery and xHTML
. 0 Comments

This kind of table has been around for years. It’s nice to finally know how to make them.

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<html>
<head>
<title>jQuery day 2 of 15</title>
 
<script type="text/javascript" src="jquery.min.js"></script>
 
<script>
 
$(document).ready(function() {
 
	// this stripes our table very nicely
	$("table tbody tr:odd").addClass("alt");
 
	// now add the hover bit
	$("table tbody tr").hover(
 
		function() {
		// over
			$(this).addClass("highlight");
		},
 
		function() {
		// out
			$(this).removeClass("highlight");
		}
 
	);
 
 
});
 
</script>
 
<style>
table {
	margin: 50px auto 0 auto;
	border: 1px solid #666666;
 
}
thead tr {
	background-color: #666666;
}
th {
	font-weight: bold;
	color: #ffffff;
	padding: 5px;
}
td {
	width: 200px;
	padding: 5px;
}
.alt {
	background-color: #cccccc;
}
.highlight {
	background-color: #ff9900;
}
.highlight td {
	border-top: 1px solid #666666;
	border-bottom: 1px solid #666666;
}
</style>
 
</head>
 
<body>
 
<table cellspacing="0" cellpadding="0">
	<thead>
		<tr>
			<th>One</th>
			<th>Two</th>
			<th>Three</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>One</td>
			<td>Two</td>
			<td>Three</td>
		</tr>
		<tr>
			<td>One</td>
			<td>Two</td>
			<td>Three</td>
		</tr>
		<tr>
			<td>One</td>
			<td>Two</td>
			<td>Three</td>
		</tr>
		<tr>
			<td>One</td>
			<td>Two</td>
			<td>Three</td>
		</tr>
		<tr>
			<td>One</td>
			<td>Two</td>
			<td>Three</td>
		</tr>
	</tbody>
</table>
 
</body>
</html>

My First jQuery

Published
by
ethan
on July 30, 2008
in Source, Uncategorized and jQuery
. 0 Comments

We have a column of gallery names on the left, and a grid of thumbnails on the right. Each gallery name corresponds to a thumbnail, and they are both links to a gallery page. Like this:

We want the thumbnail to “light up” when you hover over the gallery name, and we want the gallery name to light up when you hover over the thumbnail. The solution was original written with a javascript function and a set of onMouseOver() onMouseOut() events. You had two huge javascript function calls for each text link and two huge javascript function calls for each thumbnail link. Ick.

So I rewrote it with jQuery, which I know nothing about. I was able to remove all the onMouseOver() and onMouseOut() crap from all of the links, and I added this jQuery code:

function textToNum(num) {
	if (num == "one") 	{ return "1"; }
	if (num == "two") 	{ return "2"; }
	if (num == "three")   { return "3"; }
	if (num == "four") 	{ return "4"; }
	if (num == "five") 	{ return "5"; }
	if (num == "six") 	{ return "6"; }
	if (num == "seven")   { return "7"; }
	if (num == "eight")    { return "8"; }
	if (num == "nine") 	{ return "9"; }
	return "zero";
}
 
function numToText(num) {
	if (num == "1") { return "one"; }
	if (num == "2") { return "two"; }
	if (num == "3") { return "three"; }
	if (num == "4") { return "four"; }
	if (num == "5") { return "five"; }
	if (num == "6") { return "six"; }
	if (num == "7") { return "seven"; }
	if (num == "8") { return "eight"; }
	if (num == "9") { return "nine"; }
	return "0";
}
 
 
$(document).ready(function(){
 
	// this adds the code to highlight the thumbnails when you hover over the text
	$("#secondaryNavFive ul li a span").hover(
 
		function() {
			// over
 
			var span_id = $(this).attr('id');
			var image_id = textToNum(span_id); // one highlights image with id 1
			$("#" + image_id).css('border-color', '#f89828');
 
		},
 
		function() {
			// out (not hovering any more)
 
			var span_id = $(this).attr('id');
			var image_id = textToNum(span_id); // one highlights image with id 1
			$("#" + image_id).css('border-color', '#333333');
 
		}
 
	);
 
 
	// this adds the code to highlight the TEXT when you hover over the THUMBNAIL
	$("#mainContentFour .thumbs a img").hover(
 
		function() {
			// over
 
			var image_id = $(this).attr('id');
			var span_id = numToText(image_id);
			$("#" + span_id).css('color', '#f89828');
 
		},
 
		function() {
			// out (not hovering any more)
 
			var image_id = $(this).attr('id');
			var span_id = numToText(image_id);
			$("#" + span_id).css('color', '#aaaaaa');
 
		}	
 
	);
 
 
 });