Jquery multiple pagination

$(document).ready(function(){

//how much items per page to show
var show_per_page = 1;
//getting the amount of elements inside content div
var number_of_items = $('#content').children().size();
//calculate the number of pages we are going to have
var number_of_pages = Math.ceil(number_of_items/show_per_page);

//set the value of our hidden input fields
$('#current_page').val(0);
$('#show_per_page').val(show_per_page);

//now when we got all we need for the navigation let's make it '

/*
what are we going to have in the navigation?
- link to previous page
- links to specific pages
- link to next page
*/
var navigation_html = '<a class="previous_link" href="javascript:previous();">Prev</a>';
var current_link = 0;
while(number_of_pages > current_link){
navigation_html += '<a class="page_link" href="javascript:go_to_page(' + current_link +')" longdesc="' + current_link +'">'+ (current_link + 1) +'</a>';
current_link++;
}
navigation_html += '<a class="next_link" href="javascript:next();">Next</a>';

$('#page_navigation').html(navigation_html);

//add active_page class to the first page link
$('#page_navigation .page_link:first').addClass('active_page');

//hide all the elements inside content div
$('#content').children().css('display', 'none');

//and show the first n (show_per_page) elements
$('#content').children().slice(0, show_per_page).css('display', 'block');

});

function previous(){

new_page = parseInt($('#current_page').val()) - 1;
//if there is an item before the current active link run the function
if($('.active_page').prev('.page_link').length==tr ue){
go_to_page(new_page);
}

}

function next(){
new_page = parseInt($('#current_page').val()) + 1;
//if there is an item after the current active link run the function
if($('.active_page').next('.page_link').length==tr ue){
go_to_page(new_page);
}

}
function go_to_page(page_num){
//get the number of items shown per page
var show_per_page = parseInt($('#show_per_page').val());

//get the element number where to start the slice from
start_from = page_num * show_per_page;

//get the element number where to end the slice
end_on = start_from + show_per_page;

//hide all children elements of content div, get specific items and show them
$('#content').children().css('display', 'none').slice(start_from, end_on).css('display', 'block');

/*get the page link that has longdesc attribute of the current page and add active_page class to it
and remove that class from previously active page link*/
$('.page_link[longdesc=' + page_num +']').addClass('active_page').siblings('.active_page' ).removeClass('active_page');

//update the current page input field
$('#current_page').val(page_num);



}