Dropdown field null or not an object

getnaren

in the initilization of form I check for the value like this...


if(IWDatacapture.getItem("/doc/id").getOptions()[IWDatacapture.getItem("/doc/id").getValue()].value != 0){
IWDatacapture.getItem("/doc/id").setReadOnly(true);
}

when I open a dcr I get
'IWDatacapture.getItem(...).getOptions()[...].value' is null or not an object

once I select some value, save it and open it...the error will go away as there is some value...

is there any way I can check for null value?

I tried checking for null like this

if(IWDatacapture.getItem("/doc/id").getOptions()[IWDatacapture.getItem("/doc/id").getValue()].value != null){
IWDatacapture.getItem("/doc/id").setReadOnly(true);
}

nipper

I suspect IWDatacapture.getItem("/doc/id").getValue() is null, check for it 1st.