// JavaScript Document

function rot13(input) {
	var coding = 'ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMabcdefghijklmnopqrstuvwxyzabcdefghijklm';
	
	for (var text = '',i=0;i<input.length;i++) {
		character = input.charAt(i);
		position = coding.indexOf(character);
		if (position > -1)
			character = coding.charAt(position + 13);
		text += character;
	}
	
	return text;
}

function ontRot(linkje) {
	if (linkje.href.indexOf('mailto:')!=0) {
		linkje.href=rot13(linkje.href);
	}
}