Output does not seem to be right

I ran it with option show on the page on Suse linux 11 and I get following output

nagios@cubic:~> ./check_cpu_stats.sh -w 90,40,30 -c 90,50,40 -i 3 -n 5
./check_cpu_stats.sh: line 172: [: 90,40,30: integer expression expected
./check_cpu_stats.sh: line 175: [: 90,50,40: integer expression expected
CPU STATISTICS OK : user=6.50% system=1.33% iowait=92.17% idle=% nice=0.00% | CpuUser=6.50;CpuSystem=1.33;CpuIoWait=92.17;CpuIdle=;CpuNice=0.00;90,40,30;90,50,40
nagios@cubic:~>

Integre expression expected is one issue and second thing idle is always empty.
if I run it like this then i don’t get integer expression but Idle is still empty

nagios@cubic:~> ./check_cpu_stats.sh -w 90 -c 95 -i 2 -n 10
CPU STATISTICS WARNING : user=7.25% system=2.62% iowait=90.12% idle=% nice=0.00% | CpuUser=7.25;CpuSystem=2.62;CpuIoWait=90.12;CpuIdle=;CpuNice=0.00;90;95
nagios@cubic:~>

also you can see that its warning just because IoWait is hitting 90%