SharePoint + Javascript : How to validate People Picker using Javascript?

Hi,

I have a status column(drop-down) in my form and a Assigned To(people picker).

I need to have a condition, if the value of status = Transferred, then, Assigned To should be mandatory.

Here is the code that I have implemented:

<script language="javascript" type="text/javascript">
 
function getTagFromIdentifierAndTitle(tagName, identifier, title) {
var len = identifier.length;
var tags = document.getElementsByTagName(tagName);
for (var i=0; i < tags.length; i++) {
var tempString = tags[i].id;
if (tags[i].title == title && (identifier == "" ||
tempString.indexOf(identifier) == tempString.length - len)) {
return tags[i];
}}
return null;
}

function PreSaveAction() {

var theInputDDLTS = getTagFromIdentifierAndTitle("select","DropDownChoice","Status");

var theInputMLTRR = getTagFromIdentifierAndTitle("Textarea","UserField_downlevelTextBox","People Picker");

if(theInputDDLTS.value == "Transferred")
{
 if((theInputMLTRR.value == "") || (theInputMLTRR.value.charCodeAt(0) == 32))

  { 
   alert("Please fill Assigned To, if task is transferred");
   return false;
   
  }

}

else
{
 return true;
}
return true;
}

</script>

But this is not working, it does not give me any alert box or validation and simply saves the task.

Regards, Priyanka Makkar