var request = createRequest();

function createRequest() {
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = false;
}
}
}
return request;
}


function AddFav(ID,UID) {
var url = "includes/fav_process.php?action=add&id="+ID;
request.open("GET", url, true);
request.onreadystatechange = function(){Changeclass(UID)};
request.send("");
}


function Changeclass(UID) {
var FAV = document.getElementById('fav_'+UID);
var DONE = document.getElementById('done_'+UID);
FAV.className="favhide";
DONE.className="favshow";
}