asp.net - How to store a value in a variable and maintain this value in another method in AJAX -

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in application getting value sql stored procedure getting value in ajax method.now want pass value method in ajaxscript page.what want do.i have tried session ,but not working.

if (str1.length > 0)              {                 var bu = str1.split('|||')                  (var icount = 0; icount < $(sddlbusinessunit).options.length; icount++)                      {                         if ($(sddlbusinessunit).options[icount].value == maincondetails[3])                      {                         $(sddlbusinessunit).options[icount].selected = true;                         $(sddlsite).length = 0;                         var siteid = maincondetails[4];                         //$_session["id"] = siteid;                          if (($(sddlbusinessunit)).selectedindex > 0) {                             displayloadingimage(($(sddlbusinessunit)));                             var url = requesturl + '?mode=bu&bu=' + (($(sddlbusinessunit))).options[($(sddlbusinessunit)).selectedindex].value; //append name search requesturl                             xmlhttp = null;                              xmlhttp = getxmlhttpobject(sitehandler);                             xmlhttp_get(xmlhttp, url); //send xmlhttp specified url                              getdata(siteid);                         }                         break;                     }                 }                 }

here in method store value of maincondetails[4] in var siteid , iwant siteid in method

function sitehandler() {                 if (xmlhttp.readystate == 4 || xmlhttp.readystate == 'complete') {                     hideloadingimage();                     var str = xmlhttp.responsetext;                     if (str != "") {                         var results = str.split('~~');                         $(sddlsite).selectedindex = -1;                         $(shdnsiteid).value = '';                         if (results.length > 0) {                             var sites = results[0].split('|||')                             var site;                             $(sddlsite).length = sites.length + 1;                             $(sddlsite).options[0].value = 0;                             $(sddlsite).options[0].text = '-- select -';                             (i = 0; < sites.length; i++) {                                 site = sites[i].split('||');                                 $(sddlsite).options[i + 1].value = site[0];                                 $(sddlsite).options[i + 1].text = site[1];                                      //                                var data = httpcontext.current.session["id"];  //                                    if (site.length > 0) { //                                        (var icount = 0; icount < $(sddlsite).options.length; icount++) { //                                            if ($(sddlsite).options[icount].value == objthis) { //                                                $(sddlsite).options[icount].selected = true; //                                                break; //                                           //                                        } //                                    }  //                                }                             }


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