code related to html editor

You're going to need to add this to the top of the page: 

@media print {
    .PageBreak{page-break-after: always;}
}

Then on the button click insert a div or span with the css class of .PageBreak

Or go through following links it will help you

http://shellcreeper.com/how-to-add-next-page-or-page-break-button-in-wordpress-editor/

http://kb.its.psu.edu/cms/article/95