Help with submit button remove null value

Hello,

  First of all I dont know much about java, but I wanted to create a submit button and I did alot of research.  I want a button that will email some pdf files I have created in LiveCycle.  So far everyting works but my code needs help.

There are a few fields I want to be place in the body of the e-mail, but if left blank I dont want null to apear on the email subject or body.

Here is what I have so far *this is a work around I like to konw the proper code.

var

strToAddress, strCCAddress, strSubject, strMessage

strToAddress

=myemail@atwork;

strCCAddress

=myemail@atwork;

strSubject

= "Account "+DropDownList1.rawValue+" For: " +last.rawValue +", " +first.rawValue +" " +mi.rawValue;

if

(mi.rawValue ==null|| mi.rawValue =="")strSubject = "Account "+DropDownList1.rawValue+" For: " +last.rawValue +", " +first.rawValue;

strMessage

= "Please " +DropDownList1.rawValue +" account for " +"\n"+first.rawValue +" " +mi.rawValue +". " +last.rawValue +"\n\n*All provisions in  have been met" +"\n\n Comments: " +com.rawValue;

if

(mi.rawValue ==null|| mi.rawValue =="")strMessage = "Please " +DropDownList1.rawValue +" account for " +"\n"+first.rawValue +" " +last.rawValue +"\n\n*All provisions in have been met" +"\n\n Comments: " +com.rawValue;

event.target.submitForm({cURL

:"mailto:"+ strToAddress + "?cc=" + strCCAddress + "&subject=" + strSubject + "&body=" + strMessage,cSubmitAs:"PDF",cCharset:"utf-8"});

//this.resolveNode("#event").submit.target = "mailto:"+ strToAddress + "?cc=" + strCCAddress + "&subject=" + strSubject + "&body=" + strMessage;

The 4 fields am working on are First name, last name, Mi and comments.  First and last are alwasy used, but if MI is not I dont want Null in there, with what I have above it works but its messy.  I wanted to do the same with Comments if its left blank I like for it to read "Comments: None" not null

on the If statement I just re did the whole deal with out the  mi.rawvalue but i now that is not right way... any help would be great.

Thanks