If else not working

Hi

I spent a lot of time reading and talking with folks.  Finally wrote the script properly

Adobe said no problems but it still doesn't work.

[side question: javascript developer was unsure about event.value and this.getfield.  These are defined by Acrobat?)

Have drop down field with 3 results: Pass, Fail or NA

IF Pass then print averagesupplyrows

If Fail then print averagesupplyrowsleft

IF NA then print NA

see script:

var nSupplyvelocitypassfailnaDD = this.getfield("SupplyvelocitypassfailnaDD").value;

var nAveragesupplyrows = this.getfield("averagesupplyrows").value;

var nAveragesupplyrowsleft = this.getfield("averagesupplyrowslefta").value;

if( SupplyvelocitypassfailnaDD == "Pass" ) {

event.value = nAveragesupplyrows;

}

else if( SupplyvelocitypassfailnaDD == "Fail" ) {

event.value = nAveragesupplyrowslefta;

}

else if ( SupplyvelocitypassfailnaDD == "NA" ) {

event.value = "NA";

}