Hi,

I am currently having an issue with the rendered attribute for an outputpanel. I currently have it check against an inputfield to see if it is blank.

It works with 1 condition: <apex:outputPanel rendered="{!LEN(address)<1}"  >

But if I want to add in an additional OR || statement to check for {!LEN(city)<1} than it breaks.

I tried the following:

<apex:outputPanel rendered="{!LEN(address)<1} || {!LEN(city)<1}">

<apex:outputPanel rendered="{!LEN(address)<1} OR {!LEN(city)<1}">

<apex:outputPanel rendered="{!LEN(address) || !LEN(city) <1}">

<apex:outputPanel rendered="{!LEN(address) OR !LEN(city) <1}">

I am probably missing something super simple. Any help would be greatly appreciated. 

Thanks in advance!