<script src='http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js' type='text/javascript'/></script>

<script type='text/javascript'>
    $(function() {
        $('.email').each(function(i) {
            var spamisTrash = $(this).html();
            spamisTrash = spamisTrash.replace("[at]", "@");
            spamisTrash = spamisTrash.replace("[dot]", ".");
            $(this).html(spamisTrash).replaceWith("<a href=\"mailto:" + $(this).text() + "\">" + $(this).text() + "</a>");
        });
    });
</script>

<div class="email">YourEmailID[at]gmail[dot]com</div>

<p class="email">YourEmailID[at]yahoo[dot]com</p>

<span class="email">YourEmailID[at]blahblehbloh[dot]com</span>

Email link with jQuery Plugin

jquery

jQuery