Can Client Side Scripts See Server Side Form?

I have a Client Side Java Script which is supposed to re-load the options on my serverside ASP form.

I have been trying to get the syntax right to assign the Select box on the ASP form to a variable in my JavaScript so I can update the options. Can anyone either tell me if this is not possible or what the syntax should be. Here is some information.

Form Name = AddProdForm
Select Box name = subprodline
JavaScript Variable = form1

Here is one of the many versions of this line I have tried.

var form1=document.forms(""AddProdform"");

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