is it legal to store jquery reference?

var global_ref = null;

function a(){
    function some_click_handler {
        glob开发者_JAVA百科al_ref = $(this);
    }
}

// later in 
function b()
{
    $(global_ref).css(...) // or global_ref.css(...) ???
}

Is above concept right? and the syntax right?

You don't need $( global_ref ), as global_ref is already a jQuery object.

That being said, relying on globals like that is a bad practice, but it will work (assuming b() is always called after a())

Ignoring some syntax errors this is certainly legal. But you just need global_ref.css(...) as after global_ref = $(this) it is already a reference to a jQuery object