How can I toggle between multiple .css with jquery? -

essentially trying figure out how expand amount of things can toggle between single button dynamically. able toggle between 2 of these

<button type="button" id="spacebutton" onclick="$('#galaxy').toggle()">brellas</button>  

which toggle #galaxy, , other background iframe video inside.

basically, want able toggle between two, , 3 other css files, couldn't find suitable on google.

i'm new programming, please gentle.

frankly, can add/remove links external css files, in reality, can toggle, well, everything. if wanted to.

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edited add example:

given link such this:

<link id="csslink" href="my.css" type="text/css" rel="stylesheet"> 

the jquery:

$('head')     .find('#csslink') // find css link     .remove()         // remove     .end()            // return $('head') object     .append('<link id="csslink" href="mynew.css" type="text/css" rel="stylesheet">');