how to ask for Jscript variable?

[lisawebs]

ok, I got the opposite way,
but how can I ask: if (jscript.variable then...)

[planetsim]

Can you please give a better explanation. i can only guess what you want

[lisawebs]

to pass php variable to jscript variable:
var variable = '<?php print "$phpvariable"; ?>'

what the opposite?
var alfa = 1
how can I test alfa value from within PHP?