You might find this function useful: var fixedSendPing = (function(){
var last={};
return function(left,top,pageid,playerid,pull){
if( last.left === left &&
last.top === top &&
last.pageid === pageid ) {
sendPing(-100,-100,pageid,null,false);
}
sendPing(left,top,pageid,playerid,pull);
last.left=left;
last.top=top;
last.pageid=pageid;
};
}())
It might not be an issue for your use case, but in testing I found that sendPing() won't ping the same place twice in a row. This version of sendPing(), called as fixedSendPing() and otherwise identical, will detect if the same location is pinged twice in a row and send a ping for a non-visible location first to clear things out. =D