Listbox with if statement

[bonechair]

This is the code:

if (this["rulename"+i] != ''){
lbxAddressDisplay.addItem(
sLabel,
{id:this["id"+i],
date:this["date"+i],
time:this["time"+i],
user:this["user"+i],
flowid:this["flowid"+i],
pid:this["pid"+i],
sip:this["sip"+i],
dip:this["dip"+i],
smask:this["smask"+i],
dmask:this["dmask"+i],
sport:this["sport"+i],
dport:this["dport"+i],
rulename:this["rulename"+i],
prio:this["prio"+i],
adv1:this["adv1"+i],
adv2:this["adv2"+i],
adv3:this["adv3"+i],
shared:this["shared"+i],
shared:this["shared"+i]

}

);

}

Now it still prints

Rulename: Blah
Rulename: Blah
Rulename:
Rulename:

I want those empty fields gone