Is it Possible to pass Array / Collection of Data From Aspx Code Behind to JavaScript ?

It's not solving the issue itself but it solves the problem if you have only one array to pass: you can send an arbitrary number of parameters to a JavaScript function, and access them through the arguments special variable. It becomes analogous to a function accepting a variable number of arguments, with the same advantages and problems (for instance, you have to pass the array last, and as mentioned earlier you can only pass one).

Here's an example JavaScript function:

function foo()
{
    var stringArgs = [];
    for (var i = 0; i < arguments.length; i++)
        stringArgs.push(arguments[i]);

    // do stuff with stringArgs
}

And you'd call it from C# like this:

List<string> arguments = new List<string>();
arguments.Add("foo");
arguments.Add("bar");
webBrowser.InvokeScript("foo", arguments.ToArray());

Thanks,
-RG