gistfile1.txt

------------- file that loads first

function loader()
{
 var uri = 'http://a.com/skeleton.js';
    var headID = document.getElementsByTagName("head")[0];
    var newScript = document.createElement('script');
    newScript.type = 'text/javascript';
    newScript.src = uri;
    headID.appendChild(newScript);
		
}
loader();
…
some functions affects on skeleton built before
…
var foo= function(){}

----------------------skeleton.js
function skeleton_init(){
    //Drawing some divs here
    setTimeout(foo, 1000); //<-cannot run this if simply copypaste content instead of function
}
skeleton_init();