java selenium - Nav to a page number not shown on a Paginated Table

   var tab_options = {title: 'Table View',
        showRowNumber: true,
        width: '100%',
        hieght: '50%',
        page: 'enable',
        pageSize: '10',
        // pagingSymbols: {prev: ['< prev'],next: ['next >']},
        allowHtml: true,
        alternatingRowStyle: true}

    // Instantiate and Draw our Table
    var table = new google.visualization.Table(document.getElementById(div_id));

    table.clearChart();
    table.draw(TableData, tab_options);

from selenium import webdriver
import time
from selenium.webdriver.support.ui import Select

driver = webdriver.Chrome()
driver.maximize_window()
driver.get('http://cancer.sanger.ac.uk/cosmic/sample/overview?id=2120881')
elem = driver.find_element_by_link_text("Variants")



while elem:
    elem.click()
    time.sleep(5)
    select = Select(driver.find_element_by_name('DataTables_Table_0_length'))
    select.select_by_value('100') # you can use any value 
    try:
        elem = driver.find_element_by_link_text("Next")
        print(elem.is_enabled())
        if 'disabled' in elem.get_attribute('class'):
            print "Before Break"
            break
    except:
        print('Next not available or page not loaded!')

driver.quit()

True
True
True
Before Break

<p>Displaying <?php echo $start_from+1 ?> - <?php echo $start_from + $total_records ?> of Records: <?php echo $num ?></p>