Automatically Add A Toggle Function?

I have many articles. Article structure as follows

HTML Code:

<div class="selected">
<p>[I]some word[/I]</p>
<p>[I]some word[/I]</p>

[code]....

Whether jQeury can according to article words, automatically add a toggle function?I need show the first 3 <p></p> and toggle the rests <p></p>.

HTML Code:

jQuery('.selected').find('p:nth(3)').add('<a class="toggle">view more</p>');
$('.toggle').click(function () {
$("p").toggle();
});