Page History

function normalizeSPUserAccount(userName) {
// return userName;
var splitedTokens = userName.split("|");
return splitedTokens[splitedTokens.length - 1].replace(" ", "");
}

//this function is used to retrieve user account for sharepoint online
function getSPUserAccount() {
var _current_user_name = "Anonymous_" + Math.random() * 100000;
var url = window.location.protocol + "//" + window.location.host;

if (typeof _spPageContextInfo !== "undefined") { //2010,2013,Online
url += _spPageContextInfo.webServerRelativeUrl;
}
else if (L_Menu_BaseUrl) { //2007
url += L_Menu_BaseUrl == "" ? "/" : L_Menu_BaseUrl;
}
url += "/_layouts/userdisp.aspx?Force=True&d=" + new Date().getTime();

var xmlhttp;
if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", url, false);
xmlhttp.send(null);
if (xmlhttp.statusText == "OK") {
try {
if (!(typeof __Page === 'undefined'))
var spenv = __Page.agent;
var strToSearch = '<td valign="top" class="ms-formbody" width="350px" id="SPFieldText">'; //2013,online
if (!(typeof spenv === 'undefined')) {
if (spenv.indexOf("2010") != -1)
strToSearch = '<td valign="top" class="ms-formbody" width="450px" id="SPFieldText">';
else if (spenv.indexOf("2007") != -1)
strToSearch = '<TD valign="top" class="ms-formbody" width="450px" ID="SPFieldText">';
}
var pos = xmlhttp.responseText.indexOf(strToSearch);
if (pos >= 0) {
var dispnamePropertiesHtml = xmlhttp.responseText.substring(xmlhttp.responseText.indexOf(strToSearch) + strToSearch.length, xmlhttp.responseText.length);
dispnamePropertiesHtml = dispnamePropertiesHtml.toLowerCase();
dispnamePropertiesHtml = dispnamePropertiesHtml.substring(0, dispnamePropertiesHtml.indexOf('</td>') - 5);
dispnamePropertiesHtml = dispnamePropertiesHtml.substring(dispnamePropertiesHtml.indexOf('-->') + 3, dispnamePropertiesHtml.length);
_current_user_name = normalizeSPUserAccount(dispnamePropertiesHtml.trim());
}
} catch (ex) {
__trace(ex.message);
}
}
if (!_current_user_name || _current_user_name == "") {
_current_user_name = "Anonymous_" + Math.random() * 100000;
}
return _current_user_name;
}