The code below is not working, it should find duplicate values using jQuery:
$().SPServices({
operation: "GetListItems",
listName: "Questions",
async: false,
CAMLQery: query,
completefunc: function(xData,status)
{
$(xDataresponseXML).find("\\z:row").each(function()
{
var duid-$(this).attr("ID");
if(i==duid)
{
alert("Found");
}
});
}
});