Javascript: how to insert value into text input fields from a drop down menu -

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I am quite new to javascript, so I hope that someone here can help me with this small task.

I currently have two input text fields, which I need to be populated with text after choosing an option from the drop down menu.

For example ...

I have a selected field that looks like this: 

  & lt; Select ID = "select_2" onchange = "insertProduct (2);" & Gt;

And in that selection I have options that look like this: 

  & lt; Option id = "cdrom001" title = "my cdrom" & gt; Cdrom001 - my cdrom & lt; / Option & gt; & Lt; Option id = "DVD-ABUG" title = "life of a bug" & gt; DVD-ABUG - A Bug's Life & lt; / Option & gt; & Lt; Option id = "DVD-BELOVED" title = "dear" & gt; DVD-BELOVED - Furry & lt; / Option & gt; ....

What do I do, when I select an option from that drop down list, then I want my text input field # 1 with option ID Populate (e.g., DDD-AUG) and I want my text input field # 2 to be populated with the option title (such as the life of a bug).

Here is the code for my two text input fields:

I have a lot of writing of this function which will be required to do this ... 

  function insertProduct (id) {// code here

As you can see, I do not have much: o)

Can someone help me with that function that does this? Could?

Thanks a lot!

Change this line:

To do this: 

  & lt; Select ID = "select_0" onchange = "insertProduct (this, 0);" & Gt;

and use this function: 

  function insertProduct (select, line) {var model = "model_"; Var product = "product_"; Document.getElementById (model + line) .value = select.options [select.selectedIndex] .id; Document.getElementById (Product + line) .value = select.options [select.selectedIndex] .title; }

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