Hi,

I made one VF page, code given below. My requirement is when user select any record from look up(Site_Address__c), the value of some field from Site address should map to some fields in Contact, as "Street"which is in Street Adress, should populate in "Mailing Street" of contacts. I dont want this when user save the record(as it can be done by trigger), I want as soon user chose any record, correspond to that record value should populate.(By onchange).

Can any one provide me soln for this with sample code?

<apex:page standardController="Contact" >

    <apex:form >
        <apex:pageBlock >

                    <apex:pageBlockSection title="Address Information" columns="2">
                    <apex:outputPanel layout="block"> 
                    <label for="checkbox">Select address from existing address </label> 
                    <input id="checkbox" type="checkbox"/> 
                    </apex:outputPanel>
                     <apex:inputField value="{!contact.Site_Address__c}" />                   

                               
                <apex:inputField value="{!Contact.MailingStreet}"/>
                <apex:inputField value="{!Contact.MailingCity}"/>
                <apex:inputfield value="{!Contact.MailingState}"/>
                <apex:inputfield value="{!Contact.MailingPostalCode}"/>
                <apex:inputfield value="{!Contact.MailingCountry}"/>
               
                                             

                            </apex:pageBlockSection>
            <apex:pageBlockButtons >
                <apex:commandButton action="{!save}" value="Save"/>
            </apex:pageBlockButtons>
        </apex:pageBlock>
    </apex:form>
</apex:page>

Thanks