How to populate a text field on a NewForm based on a Column lookup selection?

Hi Guys,

I have these Lists.

How can I display the EmailAddress of Supplier’s List in the EmailAddress text field of Initiator’s List whenever its corresponding company is selected?

I have tried to using this code from this post (thanks to the author) on my NewForm but I can seem to get this working. Maybe I’m doing something wrong here.  I’m not a programmer actually so I’m looking forward guys for your advice.

<script type="text/javascript" src="/TestSubsite/Scripts/jquery-1.6.2.js" language="javascript"></script><script type="text/javascript" src="/TestSubsite/Scripts/jquery.SPServices-0.7.2.min.js" language="javascript"></script><script type="text/javascript" language="javascript">


$(document).ready(function() {
 $().SPServices.SPDisplayRelatedInfo({ 
 
columnName: "Company", 
relatedList: "Suppliers", 
relatedListColumn: "Name", 

relatedColumns: ["EmailAddress"],
displayFormat: "list", 
//Hide Column Headers and the data output from original function, not using the function as originally designed 
//headerCSSClass: "ms-hidden", 
//rowCSSClass:"ms-hidden", 
completefunc: SetFields,
debug: true
  });
}); 
function SetFields(){ 
          var srcDivId = "SPDisplayRelatedInfo_Terms";
          var tds = document.getElementById(srcDivId).getElementsByTagName("td");
          var Column1Data = tds[0].innerHTML; 
          var theDropDown = getTagFromIdentifierAndTitle("select","","Company");  
           var theTextBox = getTagFromIdentifierAndTitle("input","","EmailAddress"); 
           //This is what prevents it from being changed every time the page flips.
            if (theTextBox.value==""){ 
              theTextBox.value = Column1Data;  
                         } 
          else if (theTextBox.value!==Column1Data){          
                     theDropDown.parentElement.onclick = function(){   
                      theTextBox.value = Column1Data;
                           }; 
          }     
              };
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;         
          };</script>

By the way, we are on SharePoint Foundation 2010 and just using SharePoint Designer if that would help.

Thanks in advanced,

Arnel