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sekhar passamsekhar passam 

I have 3 fields on a vf page .now when ever if filled all 3 fields the vf page should be automatically submitted without clicking any buttion .

Whenever i select city the page should be  automatically submitted;
Note: I don't have any button on Vf pafe 
SandhyaSandhya (Salesforce Developers) 

You can have a Javascript function to check everything you want has been set, and then if it has, submit the form:

Refer below link for sample code
Please mark it as solved if my reply was helpful, it will make it available
for others as a proper solution.

Best Regards,
Bhargavi TunuguntlaBhargavi Tunuguntla
Hi sekhar,

You can use javascript function to check the fields and submit it without button click.The code below worked for me for your requirement.
<script type="text/javascript">
    function check()
      if(document.getElementById('pageId:form1:Name').value!='' && document.getElementById('pageId:form1:Gender').value!='' && document.getElementById('pageId:form1:DOB').value!='')
    <apex:form id="form1">
        <apex:actionFunction name="Submit" action="{!Submit}" id="Submit" />
    Name:<apex:inputText id="Name" value="{!Name}" onkeyup="check();"/>
   Gender: <apex:inputText id="Gender" value="{!Gender}" onkeyup="check();"/>
    DOB:<apex:inputText id="DOB" value="{!DOB}" onkeyup="check();"/>

Please check the code.Let us know if it was useful.