What is this plugin for adding ' hot tags '? As shown in the figure below

What are the plugins that add ' hot tags '? As shown in.

Look at the source code, I do not think this is self-developed, it should be plug-in bar, but I can not find specific plug-ins,
You know what to say.
------to solve the idea----------------------
This is more miscellaneous, the search time used to AutoComplete, style to write their own

$ ("#ask-search-tag"). AutoComplete (wd_gettagurl,{
Matchcontains:true,
DELAY:500,
CACHELENGTH:100,
Matchsubset:true,
Minchars:1,
WIDTH:250,
MAX:20,
Extraparams:{type: ' Fastask '},
SCROLLHEIGHT:500,
Parse:function (data) {
Return $.map (eval (data), function (row) {
return {
Data:row,
Value:row.tagname,
Result:row.id,
Result1:row.fave_count,
Result2:row.tagimg
}
});
},
Formatitem:function (row, I, max) {
if (row.id==0) {
Return 'create a ' +row.tagname+ ' topic';
}
if (row.id==-1) {
Return '' +row.tagname+ ' is being audited';
}
if (row.id==-2) {
Return 'please use a topic that already exists';
}
Return '
' +row.tagname+ '
';
}
}). result (Fastaskaddtag);
var addid=1;
function Fastaskaddtag (event,item) {
$ ("#ask-search-tag"). Val (');
if (item.id==-1
------to solve the idea----------------------
Item.id==-2) {
return false;
}
var err_tag=$ ('. Err_tag '); Err_tag.hide ();
var tagcount=$ ("#ask-tags-item div"). length;
if (tagcount>=5) {
Err_tag.text (' Add up to five topics '). Show ();
$ ("#ask-search-tag"). Hide ();
return false;
}
var exists= ';
$ (' #ask-tags-item A[name=removetag] '). each (function () {
if (item.id==$ (this). attr (' data ') && item.id!=0) {
Exists=1;
}
})
$ (' #ask-tags-item span '). each (function () {
if (item.tagname==$ (this). Text ()) {
Exists=1;
}
})
if (exists==1) {
Err_tag.text (' has added this topic '). Show ();
return false;
}
var length=mb_strlen (item.tagname);
var sublen=math.ceil (LENGTH/2);
if (sublen>25) {
Err_tag.text (' topic length can only be 50 characters or 25 kanji '). Show ();
return false;
}
var Addstatus=1;
var addmsg= ';
if (item.id==0) {
$.ajax ({
Type: ' Post ',
Url:wd_addtagbysearchurl,
Async:false,
data:{
Tagname:item.tagname
},
Success:function (res) {
Res=eval ("(" +res+ ")");
addstatus=res[' status '];
addmsg=res[' msg '];
item.id=res[' msg '];
}
});
}
if (addstatus==0) {
if (addmsg== ' login ') {
Showlogin ();
}else{
$ ('. Err_tag '). Text (addmsg);
$ ('. Err_tag '). Show ();
$ ("#ask-search-tag"). Flushcache ();
}
return false;
}
var addhtml= '' +item.tagname+ '';
$ ("#ask-tags-item"). Append (addhtml);
if ((tagcount+1) ==5) {
$ ("#ask-search-tag"). Hide ();
}
$ ("#ask-tags-item A[name=removetag]"). Unbind (' click '). Click (function () {
Removetag ($ (this));
})
}

