How can I add multiple paragraph tag, newly tag on top within div container.
You may use prepend to add the paragraph at the top of the container:
// HTML: Lorem ipsum
$('div').prepend('Bla bla bla');
Update: Regarding your comment about how to fade in the paragraph - use fadeIn:
$("#pcontainer").prepend($('This paragraph was added by jQuery.
').fadeIn('slow'));
A working demo: http://jsbin.com/uneso