/* ----------------------------------------------------------------------------------------
Graceful E-Mail Obfuscation - JavaScript function (decodes e-mail addresses)
Last updated: July 31th, 2007 by Roel Van Gils
---------------------------------------------------------------------------------------- */

window.onload = function () 
{
	geo();
}


function geo() 
{
	if (!document.getElementsByTagName) // Check for browser support
			return false;
	var map = rot13init(); 
	var tooltip_js_on = 'Send email';
	var tooltip_js_off = 'To reveal this email address, you will need to answer a simple question';
	var links = document.getElementsByTagName('a'); // Get all anchors
	function geo_decode(anchor) 
	{ // function to recompose the orginal address
		var href = anchor.getAttribute('href');
		var address = href.replace(/.*sendemail\/([a-z0-9._%-]+)\+([a-z0-9._%-]+)\+([a-z.]+)/i, '$1' + '@' + '$2' + '.' + '$3');
		//var linktext = anchor.innerHTML; // IE Fix
		
		var linktext;
		if(anchor.innerHTML.match("...@") && !anchor.innerHTML.match(" "))
			linktext = str_rot13(address,map);
		else
			linktext = anchor.innerHTML;
		
		if (href != address) 
		{
			anchor.setAttribute('href','mailto:' + str_rot13(address,map)); // Add mailto link	
			anchor.innerHTML = linktext; // IE Fix
		}
	}
	for (var l = 0 ; l < links.length ; l++) 
	{ // Loop through the anchors
		/*
		links[l].onclick = function() 
		{ // Encode links when clicked
			geo_decode(this);
		}
		*/
		links[l].onmouseover = function() 
		{ // Display tooltip when links are hovered
			if (this.getAttribute('title') == tooltip_js_off) 
			{ // Set custom tooltip if specified
				this.setAttribute('title',tooltip_js_on);
				geo_decode(this); // Encode links when hovered (so that the address appears correctly in the browser's status bar)
			}
		}
		
		geo_decode(links[l]);
	}
}

function rot13init() 
{
	var map = new Array();
	var s = "abcdefghijklmnopqrstuvwxyz";
	for (var i = 0 ; i < s.length ; i++)
		map[s.charAt(i)] = s.charAt((i+13)%26);
	for (var i = 0 ; i < s.length ; i++)
		map[s.charAt(i).toUpperCase()] = s.charAt((i+13)%26).toUpperCase();
	return map;
}

function str_rot13(a,map) 
{
	var s = "";
	for (var i = 0 ; i < a.length ; i++) 
	{
		var b = a.charAt(i);
		s += (b>='A' && b<='Z' || b>='a' && b<='z' ? map[b] : b);
	}
	return s;
}