Visibility of button control

We know all that you can control the visibility based oon page button point on entering CONDITIONS and choose the value of the element in Expression1 is set to Null, where you put the name of element in the Expression 1.
My question is, we can control the visibility of BUTTON based on two elements of the page. For example. Value in Expression1 is null where you put the name of these two points inside the coma separatted Expresion1 «,» He did ' t work with me, but someone knows how to do. THX

Use instead an Expression of PL/SQL:

: P1_ITEM_1 IS NULL AND: P1_ITEM_2 IS NULL

Denes Kubicek
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http://deneskubicek.blogspot.com/
http://www.Opal-consulting.de/training
http://Apex.Oracle.com/pls/OTN/f?p=31517:1
http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
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Tags: Database

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