you have semicolons in the middle of your concatenation...
you can't do this:
PHP Code:
var str:String = "hi";
+ "there";
str would be equal to "hi" since the line terminates on the semicolon. the + "there"; part would error out.
you can either jam it all together on one line with no semis:
PHP Code:
var email_data:String = "name=" + name_txt.text + "&email=" + email_txt.text + "&place=" + place_txt.text + "&day=" + day_txt.text + "&time=" + time_txt.text + "&message=" + message_txt.text;
or concatenate it on different lines...
PHP Code:
var email_data:String = "name=" + name_txt.text;
email_data += "&email=" + email_txt.text;
email_data += "&place=" + place_txt.text;
email_data += "&day=" + day_txt.text;
email_data += "&time=" + time_txt.text;
email_data += "&message=" + message_txt.text;