jQuery reusable functions and global vars

I have a function which also set a few global variables. The function itself works fine but whenever I call the function a second time the global variables get changed obviously.

Here's my theoretica开发者_如何学Gol setup:

var dataurl;
var datafunction;

function GetData(_url, _function)
{
  dataurl = _url;
  datafunction = _function;
}

//Afterwards dataurl and datafunction will used by other functions.

Now I'm very new to jquery and I'm not sure on how to create this in a proper way so it can be reused more then 1 time. Could someone please help me in the right direction?

It is possible to create objects:

var myObject = function() {
    // Local variable
    this.data = '';

    // Function to call
    this.callMe = function() {
        alert(this.data);
    }

    // Function to set data
    this.setData = function(newData) {
        this.data = newData;
    }
}

var a = new myObject();
a.setData('Hello World!');
a.callMe();

Not sure how this relates to an element (jQuery plugin), but here is how you can structure your prototype:

var DataHelper = function(_url, _function){
    this.dataurl = _url;
    this.datafunction = _function;
};
DataHelper.prototype = {
    GetData: function(){
        // loads data from storage
        // using this.dataurl, and this.datafunction
    }
};

Usage:

var dataHelper = new DataHelper('/mysite/url/', function(){
    // data function
}); 

dataHelper.GetData();