Display Current Login username in sharepoint control

Introduction

Source Code

We got a requirement to display the current login username in sharepoint control.We have only access to sharepoint designer. We dont have access to add serverside code.  So we decide to user "Welcome username" message. We used javascript to display the username. Please check the following code.

Open sharepoint designer, copy and paste the code in appropriate aspx sharepoint page

<script type="text/javascript" language='javascript'>
function getLoginName()
 {
 var tags = document.getElementsByTagName('span');
 var loginName = null;
     for (var i=0; i < tags.length; i++)
     {
    if(tags[i].title =="Open Menu")
       {
          var childTag = tags[i].getElementsByTagName('DIV');
             var innerChild = childTag[0].getElementsByTagName('a');
          var tloginName = innerChild[0].innerText;
          var iLength = tloginName.length; 
    if(tloginName.indexOf("Welcome") > -1)
    {
     loginName = tloginName.substring(8,iLength);
     break;
    }
       }
  }
  return loginName;
}

 
//To display in people & group control
function setPickerInputElement(pickerNo) 
{
  var result = ""; 
  var j = 0;
  var divs = document.getElementsByTagName("DIV"); 
  for (var i=0; i <30; i++)
   {
       if (divs[i].id.indexOf("UserField_upLevelDiv") > 0)
       { 
           j++;
           if (j == pickerNo)
           {
              result = divs[i]; 
              result.innerText = getLoginName();  
              break; 
           }
        }
    } 
 }
</script>

 

setPickerInputElement(1);

call this function, and pass the people & group No.if there is only one people & control use "1", if you have more than 1, give on which control the current username need to display.

Screen

Screen1:Paste the code as shown.

Screen 2: