JavaScript: Round to any multiple of a specific number

The Javascript Math.Round() function is used for rounding to whole numbers, or decimals:

Math.round(25.9) //returns 26
Math.round(25.2) //returns 25
Math.round(-2.58) //returns -3
Math.round(28.453*100)/100  //returns 28.45

But what if you want to round to the nearest multiple of 7? Not a problem! The solution is easier than the question sounds…

7 * Math.round(12 / 7); // returns 14
7 * Math.round(2 / 7); // returns 0

A new problem this poses is if someone enters 2, the result is 0. So lets expand on the above, making sure the lowest number we get is 7. Useful for whimsical shopping cart quantity entering. In this example we want to round to the nearest 25. The onBlur of the input element ‘amount’ fires off this function:

function RoundTo(X) {
	amount = 25 * Math.round(document.getElementById('amount').value / 25);
	if (amount == 0) {
		amount = 25;
	document.getElementById('quantity').value = quantity;

OK great… but the customer entered a non numeric character. Also not a big deal. Simply wrap the whole thing in the numeric test “if (value == parseFloat(value))”:

function RoundTo(X) {
	if (document.getElementById('amount').value == parseFloat(document.getElementById('amount').value)) {
		amount = 25 * Math.round(document.getElementById('amount').value / 25);
		if (amount == 0) {
			amount = 25;
	} else {
		amount = 25;
	document.getElementById('quantity').value = quantity;

With that function, we have a form field where the user can enter in any number and the function will round to 25. If they enter a low number, we return 25. If they enter a non-numeric, we return 25

Jules’ front end development recognized by Yahoo!

I received an interesting contact form submission one evening, by a Yahoo! talent scout.

Date: Tue, 06 Feb 2007 20:53:26 -0600
Subject: Form Submission
To: [email protected]
From: <[email protected]>
MIME-Version: 1.0
Content-Type: text/plain; charset=”iso-8859-1″
Content-Transfer-Encoding: 7bit

Name: Teddi XXXXXXXX
Email: [email protected]
Phone: (408)XXX-XXXX
Company: Yahoo
City: Sunnyvale
State: CA

Hi Jules,
My name is Teddi XXXXXXXX and I’m a Talent Scout with Yahoo.
I would like to discuss Front End Engineering roles we have
with Yahoo. When might be a good time to speak?


So… that was nice!

Later that night I spoke with Teddi on the phone. Being very good at her job, she knew right away that my resume was formatted from a template. And then she gave me advice about resume writing.
I showed her some of my front end work, both of my own site and live examples of sites I’ve coded. She was very impressed.

I showed her that a search in Yahoo! for “freelance web development” shows me as the first result. And I’m number two for “freelance web developer”. I was surprised she didn’t know that. She asked “how did you pull that off?!” The reply: “It’s my job”.


Now, the problem is, that their development team is in sunny California. And I’m in NY. Yahoo! has offices in NY, but they are marketing teams. I asked what are the odds of me doing the development work for Yahoo! in NY. The reply: “Zero.”
I don’t know where it will lead. But at least it was nice to be recognized.

Post code snippets in WordPress

Here is the simplest way to easily add source code to WordPress with the built-in TinyMCE editor. There are a lot of posts of people looking for a simple solution like this. And Many people wrote plugins, that don’t really work. MoxieCode gets badmouthed for a poorly written editor. Well that’s all pretty silly. All we needed to do is read some of TinyMCE’s documentation and figure a clever CSS fix.

At the end, you’ll be able to visually embed code just like:

@ require('../../../wp-config.php');
 function wp_translate_tinymce_lang($text) {  if ( ! function_exists('__') ) {   return $text;  } else {   $search1 = "/^tinyMCELang[(['"])(.*)1]( ?= ?)(['"])(.*)4/Uem";   $replace1 = "'tinyMCELang[121]3'.stripslashes('4').__('5').stripslashes('4')";
   $search2 = "/ : (['"])(.*)1/Uem";   $replace2 = "' : '.stripslashes('1').__('2').stripslashes('1')";
   $search = array($search1, $search2);   $replace = array($replace1, $replace2);
   $text = preg_replace($search, $replace, $text);
   return $text;  } }

No plugins are needed. Minimal code changes are neccesary. And it works.

1. Edit tiny_mce_config.php:

1a. Add the Format select box:
Line 31, starts with “$mce_buttons = apply_filters(‘mce_buttons’, array(‘…”
Append to the end of that array, “, ‘formatselect’, ‘cleanup’, ‘removeformat'”. So you should now have that line as:

$mce_buttons = apply_filters('mce_buttons', array('bold', 'italic', 'strikethrough', 'separator', 'bullist', 'numlist', 'outdent', 'indent', 'separator', 'justifyleft', 'justifycenter', 'justifyright', 'separator', 'link', 'unlink', 'image', 'wp_more', 'separator', 'spellchecker', 'separator', 'wp_help', 'wp_adv_start', 'wp_adv', 'separator', 'formatselect', 'underline', 'justifyfull', 'forecolor', 'separator', 'separator', 'charmap', 'separator', 'undo', 'redo', 'wp_adv_end', 'formatselect', 'cleanup', 'removeformat'));

1b. Use your blog’s style:
Line 43, starts with “$mce_popups_css = get_option(‘siteurl’)…”
Replace lines 43 through 49 with:

 $mce_popups_css = '/[wordpressInstallRoot]/wp-includes/js/tinymce/plugins/wordpress/popups.css'; $mce_css = '/[wordpressInstallRoot]/wp-includes/js/tinymce/plugins/wordpress/wordpress.css, /[wordpressInstallRoot]/wp-content/themes/[yourCurrentTheme]/style.css'; $mce_css = apply_filters('mce_css', $mce_css); /*if ( $_SERVER['HTTPS'] ) {  $mce_css = str_replace('http://', 'https://', $mce_css);  $mce_popups_css = str_replace('http://', 'https://', $mce_popups_css); }*/

1c. Install the Block Format Menu:
In front of line 57, add:

theme_advanced_blockformats : "pre,p,div,h1,h2,h3,h4,h5,h6,blockquote,code",

1d. Modify TinyMCE’s line break behaviour:
Replace lines 72 through 75 with:

 force_p_newlines : false, force_br_newlines : false, convert_newlines_to_brs : false, remove_linebreaks : false,

1e. Modify TinyMce’s pasting behaviour:
Replace lines 76 through 78 with:

 paste_create_paragraphs : false, paste_create_linebreaks: true, paste_auto_cleanup_on_paste : true,

2. Edit your stylesheet for proper viewing in TinyMCE.

By default TinyMCE will pick up the BODY style of your stylesheet. Pretty slick, except that most sites have content in a div or td of a different style. So lets fix that.

2a. Add a style for TinyMCE’s body:
This part really depends on your current wordpress theme. What you need to do is find the style of your content div or td, and apply that to TinyMCE’s window.
At the top of your stylesheet, add:

body.mceContentBody { text-align: left; background: #FFF;}

The contents of this should match the contents of your div or td.

2b. The style of our embedded code:
Add another section to style our blocks of code, similar to:

PRE { background-color:#EFEFEF; border-left:5px solid #DDDDDD; color:#000000; font-family:"Andale Mono","Courier New",fixed-width; font-size:11px; margin:15px 0px 15px 10px; overflow:auto; padding:5px 5px 20px 5px; line-height:1em; width: 530px;}

Of course, you style is to your own taste. But I would suggest only fixed width fonts, non breaking lines, and auto overflow for scrollbars. The bottom padding of 20px is important for the bottom scroll bar. It’s actually a workaround for a particular browser. What to guess which one? I set the width to the width of my div as well, so that in TinyMCE, I get the correct view of it – scrollbars and all.


Enter your post as you normally would. Let TinyMCE go buck wild – making <p> tags all over the place.
For each block of code you pasted, select the block and use the format menu to select ‘Preformatted’. You should see that block of code in all its glory. “Hey, the line breaks are gone!” BloggerSayWha? Don’t fret. Save the post and the line breaks will magically appear.

Enjoy =)