How to pass records on onclick for apex checkbox to controller in Salesforce vf page?

Hi Deepak,

create a variable in your controller

public String selectedLetterID {get;set;}

Then set it with the param tag.

<apex:inputfield value="{!letter.Suppressed__c}" id="suppressBox" onclick="SupressLetter('{!letter.Id}');return false;"/>
<apex:actionFunction name="SupressLetter" action="{!suppressLetter}" rerender="out">
    <apex:param name="firstparam" assignto="{!selectedLetterID}" value="" />
</apex:actionFunction>

for more check:-

https://developer.salesforce.com/forums/?id=906F000000098K2IAI