Fix javascript error when window name (for window.open()) in IE8 contains a dot

Conflicts:

	program/js/app.js

1 files changed, 1 insertions, 1 deletions

diff --git a/program/js/app.js b/program/js/app.js
index 329bd772e..1d77e056e 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -821,7 +821,7 @@ function rcube_webmail()
 
         // open attachment in frame if it's of a supported mimetype
         if (this.env.uid && props.mimetype && this.env.mimetypes && $.inArray(props.mimetype, this.env.mimetypes) >= 0) {
-          var attachment_win = window.open(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1', 'rcubemailattachment'+this.env.uid+props.part);
+          var attachment_win = window.open(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1', this.html_identifier('rcubemailattachment'+this.env.uid+props.part));
           if (attachment_win) {
             setTimeout(function(){ attachment_win.focus(); }, 10);
             break;