Loadvars() send

Hi

i have made a login which send a email when a users logs in it loads some variables with this code and send them to email.php:

mail_vars = new LoadVars();
mail_vars.name1 = name1;
mail_vars.email = email;
mail_vars.body = body;
mail_vars.send("email.php", "POST");

after reaching the frame it send the email correctly and pop-up a blank window. So i read on the form that if you make the code like this it wont
pop -up:

mail_vars = new LoadVars();
mail_vars.name1 = name1;
mail_vars.email = email;
mail_vars.body = body;
mail_vars.send("email.php",newEmail,"POST");

but then it refuse to send the email someone got any idea searched the net for a day now without succes

thnx