How to create a function that is

I am not a programmer, I just a web designer with a bit of programmatic skills and I am asking for your help to learn a bit more about jquery/javascript.

I have a singl开发者_高级运维e function which is calling 2 different divs (test1 & test2)

myFunction ($("#test1"));
myFunction ($("#test2"));

I want to try to achieve instead something similar to

myFunction ($("#test1") $("#test2"));

Because I want to try to use one call, to call multiple divs. As well my problem is that my ipotetical myFunction should look like this:

myFunction (param1, param2){ if(typeof param2 == "undefined"){param2 = $(window)}; // do something}

I have no idea on how to create a multiple call to a function for doing the same action but on different elements, and with the fact that I could have multiple parameters, it doesn't make it easy for me.

Any suggestion on how to do it? or some resource where I could read for? thx, in advance! :)

myFunction($("#test1, #test2, #test3"));

Have a look at http://api.jquery.com/multiple-selector/

Another way, by making a plugin:

<div>Hello</div>
<div class="blah">Another</div>
<div class="foo">And another</div>


$.fn.myFunc = function() {

    // loop over all matches
    this.each(function() {

        // do something with each match
        alert($(this).text());            
    });
    return this;
};

// call it on any set of elements like this
$("div").myFunc();

Demo: http://jsfiddle.net/sbcvg/