...
.skill_block:hover {
    position: relative;
    opacity: 1;
    transform: scale(1.1); /*вот так*/
}
...

var a=[null,a1,a2,a3,a4,a5];
var args=[];
for(var i=1;i<len;i++) args.append(a[i]);
listeners.fn.apply(listeners.context, args);

":qwerty1:qwerty2...".replace(/:[^:]+?(\.{3}|…)/,"")

switch (length){
    case 1: 
    objects[1].call(context, params);
    return  true;
}

function a(){return 1,2,3,4,5;}
a() //вернёт 5