Not alive trigger

[pazuzu 21]

Hi, I'm trying to trigger obj done by using in condition for trigger "not alive (su1)" but I have about 7 planes to destroy & I only want trigger to go off when all the planes are destroyed & not just when "su1" is destroyed.

I tried listing all the planes(su1, su1_1, su1_2 etc) but this did not work.

How can I set this condition for all planes?

Oh the planes are just empty & parked at enemy airport...

Thanks.

[korax 4]

Try <table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">not alive su1 AND not alive su1_1 AND not alive su1_2 AND not alive su1_3 AND not alive su1_4 AND not alive su1_5 AND not alive su1_6 AND not alive su1_7  

[Bart.Jan 0]

or

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">{alive _x} count [su1, su1_1, su1_2 etc...] == 0