how to get Parent and Child value

Question

hi,

 in this directly i can give a value for paragraph but i should use parent and child by using this only i am gonna give the value for Paragraph.   please help me for that

 

 Explain;

----------- 

  i want to get the Parent and Child values.buy using that in  Paragrap tag i need to give some values after i click the button i tried but am not get that value("Muthu") for Para...Please help me for this

 

<input type="button" name="New" value="New" id="Sec">

<div id="Main">

<div id="sub">

<div id="secondsub">

<p id="para"></p>

</div>

</div>

</div>

 

script:

 

$(document).ready(function () {

$("#Sec").on("click", function () {

var getvalue = $("#Main").parent().eq(2).children().first();

getvalue.text("Muthu");

});

});