All you need to do is load a javascript file with some variable definitions, ideally namespaced. You can use a single object literal for this:
var config = {
option1: 'goods',
option2: {name: 'option2'},
option3: ['o','p','t','3']
}
Then load that file as your first script and you will have access to config information in each subsequent script eg
if (config.option1 == 'goods') doStuff();