var localServer = "/Tweets.aspx";

//função inicial
//______________________________________________________________________________________
$(document).ready(function () {
    changediv();
})

//______________________________________________________________________________________
function geturl(addr) {
    var r = $.ajax({
        type: 'GET',
        url: addr,
        async: false
    }).responseText;

    return r;
}

//______________________________________________________________________________________
function changediv() {
    $('#tweets').html(geturl(localServer));
}