I want to know what is the meaning of this function ajaxFunction(url, "1")

//alert(element.getAttribute("id") + ":" + element.value);

function populateList(element) 
var strStoreId = document.forms[0].strStoreId.value;
var strApprovingTypeId = document.forms[0].strApprovingTypeId.value;
var strCommitteeFlag = element.value;

var url = "ApprovingAuthorityMstCNT.cnt?hmode=populateList&strStoreId="
        + strStoreId + "&strApprovingTypeId=" + strApprovingTypeId
        + "&strCommitteeFlag=" + strCommitteeFlag;

ajaxFunction(url, "1");  // what is 1 here means??