Javascript 轻松修改jQuery url

Javascript 轻松修改jQuery url,javascript,jquery,Javascript,Jquery,在下面的url中,我还想包括&id= 我怎么做 url:“loadmore.php?lastid=”+$(“.positem:last”).attr(“id”),url:“loadmore.php?lastid=”+$(“.positem:last”).attr(“id”)+“&id=”, url: "loadmore.php?lastid=" + $(".postitem:last").attr("id") + "&id=<?php echo $id; ?>",

在下面的url中,我还想包括
&id=
我怎么做

url:“loadmore.php?lastid=”+$(“.positem:last”).attr(“id”),

url:“loadmore.php?lastid=”+$(“.positem:last”).attr(“id”)+“&id=”,
url: "loadmore.php?lastid=" + $(".postitem:last").attr("id") + "&id=<?php echo $id; ?>",