JavaScript

var arrIns  = [
"1","21","24","28","42","48",
"9","13","14","16","24","49",
"3","18","19","25","44","45"
];
var arr     = [];
var tmp     = 0;
var IsElm   = 0;
function indexe(){
   for(var i=0; i<arrIns.length-1; i++)
   {
      if(arrIns[i] != arrIns[i+1]) {    // arrIns[arrIns.Length - 1] = tmp;
          IsElm = i;                    // i temp
          arr[tmp++] = arrIns[i];
          arrIns.splice(arrIns[IsElm]);
      }
      return --IsElm;
      document.write(arr[tmp++] + " : " + arrIns.indexOf(arrIns[i]) + "<BR>");
      //return arrIns.indexOf(arrIns[i]);
   }
}

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var arrIns  = [
"1","21","24","28","42","48",
"9","13","14","16","24","49",
"3","18","19","25","44","45"
];
var arr     = [];
var AllLucky= [];
var ct      = 0;
var n       = 0;

do{
   for(var i=arrIns.length; i>0; --i)
   {
      arrIns[i] = arr[i];
      for(var j=0; j<arrIns.lenght; j++)
      {
         if(!arrIns[arr[j]]) {
            arrIns[arr[j]] = AllLucky[ct];
            document.write(AllLucky[ct] + "<BR>");
            ct++; n++;
         }
      }
   }
}while(n<1);

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for(var j=0; j<arrIns. lenght; j++)

arrIns[i] = arr[i]; 

if(!arrIns[arr[j]])

9 10 38 40 46 48

if (counter == 50) this.SaveData();

[WebMethod]
public bool Foo()
{
    return true;
}

function callFoo(callBack) {
    $.ajax({
            type: "POST",
            url: "pageName.aspx/Foo",
            data: "{}",
            contentType:"application/json; charset=utf-8",
            dataType: "json",
            success: function (msg) {
                if(undefined !== callBack) {
                    callBack(msg);
                }
            }
     });
}

if(50 === counter) {
    callFoo(function(e) {
        // do something here
    });
}

Steve Holdorf wrote:

One question. Does your example cause a postback?