Ariaan Bruinsma

E-mail anti-spam via JavaScript

Klik hier voor de minified versie.

/**
	 * @author Ariaan Bruinsma <bruinsma [dot] a [at] ariaan [dot] nl>
	 * @copyright Ariaan Bruinsma
	 * @version 2010-05-13, Thu 16:32:50
	 */

var Bruinsma = {};

/*
	 * scanMailto
	 * Restores all email addresses within anchor-elements.
	 *
	 * For this too work properly, by default the e-mailaddress should be
	 * written like the following examples:
	 *    john-doe@gmail.com becomes: john-dash-doe-at-gmail-dot-com
	 *    jane_dough@gmail.com becomes: jane-underscore-dough-at-gmail-com
	 * 
	 * If you have enough experience with regularexpressions, you could
	 * change the replacements too your own language. This would make it more
	 * readable for laymens.
	 *
	 * Usage and example:
	 * I'd prefer to use a proper JS-library, this will suffice for
	 * demonstration
	 *
	 *   <script>
	 *      window.onload = function()
	 *      {
	 *         Bruinsma.scanMailto(new Array(
	 *            [/\[arrobase\]/gi, '@'], [/\[point\]/gi, '.'],
	 *            [/\[trait d union\]/gi, '-'], [/\[tiret bas\]/gi, '_']
	 *         ));
	 *      };
	 *   </script>
	 *   <a href="mailto:aastian[tiret bas]armand[arrobase]gmail[point]fr">
	 *      Bastian Armand</a>
	 
	 *   <a href="mailto:isabelle[trait d union]js[trait d union]armand
	 *      [arrobase]gmail[point]fr">Armand</a>
	 *
	 */
	Bruinsma.scanMailto = function(replacements)
	{
		var list = document.getElementsByTagName('a'),
			listItem,
			replacements = ( !!replacements ) ?
				replacements :
				new Array(
					[/\-dot\-/gi, '.'],
					[/\-at\-/gi, '@'],
					[/\-underscore\-/gi, '_'],
					[/\-dash\-/gi, '-']
				);

for( k in list )
		{
			listItem = list[k]; // Bypass weird bug
			if( !!listItem.href && listItem.href.match(/^mailto:/i) )
			{
				listItem.href = Bruinsma.replaceAll(listItem.href, replacements);
				if( !!listItem.innerHTML )
					listItem.innerHTML = Bruinsma.replaceAll(listItem.innerHTML, replacements);
					
				if( !!listItem.title )
					listItem.title = Bruinsma.replaceAll(listItem.title, replacements);
			}
		}
	};
	
	/*
	 * replaceAll
	 * Multiple regularexpression-replacements
	 *
	 * @param subject: This is the input string that the function will modify.
	 * @param list: List should be a two-dimensional-array with the following
	 *    structure:
	 *       var list = [
	 *          [/regex1/, 'replacement1'],
	 *          [/regex2/, 'replacement2'],
	 *          [/regex3/, 'replacement3']
	 *       ];
	 * @return string: The return-value will be the modified string.
	 */
	Bruinsma.replaceAll = function(subject, list)
	{
		var listItem;
		for( key in list )
		{
			listItem = list[key]; // Bypass weird bug 
			subject = subject.replace(listItem[0], listItem[1]);
		}
		return subject;
	};

Created by: Ariaan Bruinsma (bruinsma(punt)a(apenstaartje)ariaan(punt)nl)