It is down to this...

 
        switch (document.getElementById(Title[Column]))
     {
      case "[object HTMLDivElement]":
       alert("[object HTMLDivElement]");
       document.getElementById(Title[Column]).innerHTML = DataString;
      break;
 
      case "[object HTMLInputElement]":
       alert("[object HTMLInputElement]");
       document.getElementById(Title[Column]).value = DataString;
      break;
      case "[object HTMLTextAreaElement]":
       alert("[object HTMLTextAreaElement]");
       document.getElementById(Title[Column]).innerHTML = DataString;
 
     break;
     }

I am fairly certain that my syntax in the case statements is wrong, if so, what should it be?

For one thing, instead of switching the getElementById directly, you should be switching each node's nodeName property. This is the only way I think that will return a standardized result.

The nodeName property is always a capitalized version of the HTML tag.

Other than that, your syntax is correct. The case statement in JavaScript is exactly like PHP and most other C-family languages.

switch (document.getElementById(Title[Column]).nodeName) {
     case "DIV":
     //do stuff
     break;
     //etc
}