flash 中actionscript
public function genParam(arg1:*):*
{
var loc1:*=new Array();
loc1["mid"]=5798938;
loc1["sid"]=1;
loc1["unid"]=76;
loc1["param"]="";
loc1["mtkey"]="5d93364b8e7f2a9b97167e5728fa8793";
loc1["langtype"]=1;
loc1["time"]="1275321470";
var sig=joins(loc1,"5d93364b8e7f2a9b97167e5728fa8793");
trace(sig);
trace(loc1);
return loc1;
}
请问下,其中的mtkey和sig以及joins代表什么?