Understand JQuery Snippet code [closed]

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Can anyone help me understand what this code snippet is doing? I'm maintaining a website and I think this is the source of a problem I am having.

function cust_addToCart(itemid, itemqty, options, viaajx, loadingf, callback) {
    var url = "/app/site/backend/additemtocart.nl?buyid=" + itemid + "&qty=" + itemqty;
    document.location.href = url;
}


$('#itemlist .addtocart-lnk').click(function() {
    $(this).next().find('.addtocart').click();
    return false; //Would this return a # for a link?
});

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This snippet:

$('#itemlist .addtocart-lnk').click(function() {
    $(this).next().find('.addtocart').click();
    return false; //Would this return a # for a link?
});

Is binding an event handler for the click event on elements with a class addtocart-lnk that are children of an element with id itemlist. Inside that event handler, the following:

$(this).next().find('.addtocart').click();

Is:

1. Finding the next immediate sibling of the link that was clicked.
2. Then finding every element with class addtocart that's a child of that sibling element,
3. Programmatically triggering the click event on those elements

This line:

return false;

Is preventing the default behavior of the link (which is hard to say without seeing your markup). Usually this prevents a link from being followed and the browser showing a new page.

---

This function:

function cust_addToCart(itemid, itemqty, options, viaajx, loadingf, callback) {
    var url = "/app/site/backend/additemtocart.nl?buyid=" + itemid + "&qty=" + itemqty;
    document.location.href = url;
}

Is building a url by concatenating the first string with the arguments itemid and itemqty, which are passed into the function. Setting document.location.href is directing the browser to that url.