help for java script.

[Mr Arvind Pandey <ar...@yahoo.co.in>]

Hi all,

     i am using h:selectManyCheckbox in my
application. Now I want to write a java script
function which will show a message if none of the
check box is selected on click of a button. 
   How should I check whether any one of the check
boxes has been selected? If none then I will have to
show a message like 'please select one of the check
box'.

h:selectManyCheckbox id="authorities"
value="#{newuser.authorities}" layout="pageDirection"
styleClass="field_text_font">

followed by f:selectItems

pls help me...



Thanks and regards....
Arvind


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