this is the code I have, I want to increment the value of the variable sfrom everytime the function is called, the function is triggered when someone scrolls to the bottom of the page.

any idea please ?

```
<script type="text/javascript">

if (typeof sfrom=="undefined") {
    var sfrom = 0;}
$(function(){

    $('.tainer').scrollPagination(
    {
        'contentPage': 'listitem.php', 
        'contentData': {startfrom:sfrom},  
        'scrollTarget': $(window), 
        'heightOffset': 5, 
        'beforeLoad': function(){

        },
        'afterLoad': function(elementsLoaded){ 
             var i = 0;
             $(elementsLoaded).fadeInWithDelay();

        }
    });   
});

```