Would it make more sense to create four inputs that are hidden, each one with one of the values from the one
in your post? I would do that rather than try to parse out certain strings from a single input value. Just give each a unique id and go from there.
If you really want to keep one, you could do the following:
<input type="hidden" value="Value1 Value2 Value3 Value4" id="some_id" name="some_name" />
and pluck out the values with:
var vals = $('#some_id').val().split(/\W+/);
and then access them by position:
var val1 = vals[0]; // "Value1"
var val2 = vals[1]; // "Value2"
...