How to show the modal view when clicking on a lookup field?

Question

I have 2 list that linked by a lookup column.

When i clicked a item of list show dispform on modal popup.

Problem is:when i click on lookup field it is open a new page.

I want show on modal popup.

in share point designer

<xsl:value-of select="@MailID" disable-output-escaping="yes"/>

if i change disable-output-escaping="no", in page show

<a onclick="OpenPopUpPage('http://mysite/_layouts/listform.aspx?PageType=4&ListId={0E7E5CF1-7382-4E32-83D0-11A298365781}&ID=12', RefreshPage); return false;" href="http://mysite/_layouts/listform.aspx?PageType=4&ListId={0E7E5CF1-7382-4E32-83D0-11A298365781}&ID=12">12</a>

Answer 1

I find my answer :)

Id of lookup field :

substring-before(substring-after(@MailID, 'ID='), '&')

and title of lookup field :

substring-after(@MailID, '>'), '<')

and use Popup

onclick="OpenPopUpPage('http://mysite/_layouts/listform.aspx?PageType=4&ListId={0E7E5CF1-7382-4E32-83D0-11A298365781}&ID={substring-before(substring-after(@MailID, 'ID='), '&')}', RefreshPage); return false;"

Answer 2

Default xsl tag for lookup field looks like
<xsl:value-of select="$thisNode/@*[name()=current()/@Name]" disable-output-escaping="yes"> try it.
PS: about disable-output-escaping.. "yes" indicates that special characters (like "<") should be output as is. "no" indicates that special characters (like "<") should be output as "<".