https://alumni-spbu.ru/js/email.js

1function checkEmail(email, name)
2{
3	if (email == "")
4	{
5		return (0);
6	}
7	if (email.search(" ") !=-1)
8	{
9		alert (name + " íå ìîæåò ñîäåðæàòü ïðîáåë!");
10		return (1);
11	}
12	if (email.search(",") != -1)
13	{
14		alert (name + " íå ìîæåò ñîäåðæàòü çàïÿòóþ!");
15		return (1);
16	}
17	if (email.search("@") == -1)
18	{
19		alert (name + " èìååò íåïðàâèëüíûé ôîðìàò!");
20		return (1);
21	}
22	return(0);
23}
24//---------------------------------------------------
25// ext. pars. -> 
26// arChEmailsOnLoad = {id, ...} 
27
28var isChEmails = document.getElementById;
29//----------------------------------------------------
30function changeEmailsOnLoad()
31{
32	if (window.changeEmailsOnLoadOld) window.changeEmailsOnLoadOld();
33	
34	var links = document.links;
35	for ( var i=0; i < links.length; i++)
36	{
37		if (links[i].href && links[i].href.indexOf("%20[at]%20") > 0)
38		{
39			links[i].href = links[i].href.replace("%20[at]%20", "@");
40		}
41	}	
42}
43
44//-----------------------------------------------------
45if (isChEmails)
46{
47	if (window.onload && !window.changeEmailsOnLoadOld)
48	{
49		window.changeEmailsOnLoadOld = window.onload;
50	}
51	window.onload = changeEmailsOnLoad;
52}