js函数多个返回值

var w = getClientSize().width;
var h = getClientSize().height - 97;

function getClientSize() {
    var a = h = 0;
    if (window.innerHeight) {
        a = window.innerWidth;
        h = window.innerHeight
    } else {
        if (document.documentElement && document.documentElement.clientHeight) {
            a = document.documentElement.clientWidth;
            h = document.documentElement.clientHeight
        } else {
            a = document.body.clientWidth;
            h = document.body.clientHeight
        }
    }
    return {
         a,
        height: h
    };
}