Ajax tips to prevent multiple clicks from sending more than one request

var Isajax=false;
$ ("BTN"). Click (function () {
if (Isajax)
Return

Isajax=true;
SetTimeout (function () {
alert (123);
Isajax=false;
},2000);
});
Just start with false, after clicking, the true will not be executed, that is no longer clickable.
Execute the next sentence, set to true at the beginning, prevent other clicks, and it will not be repeatedly clicked. Even if you click multiple times, it will only pop up once.

Ajax tips to prevent multiple clicks from sending more than one request