https://rcep.net/javascript/ajaxutil.js

1var prm = Sys.WebForms.PageRequestManager.getInstance();
2prm.add_initializeRequest(InitializeRequest);
3prm.add_endRequest(EndRequest);
4
5var btn;
6function InitializeRequest(sender, args) 
7{
8 document.body.style.cursor = "wait";                
9 var btnId=args._postBackElement.id;
10 btn= document.getElementById(btnId);
11 btn.disabled=true;
12 btn.style.cursor = "wait";
13}
14
15function EndRequest(sender, args) 
16{                
17 document.body.style.cursor = "default";    
18 if(btn!=null) 
19 {
20     btn.style.cursor = "default";
21     btn.disabled=false; 
22 }
23 
24}