/**
 * ブラウザサイズ取得
 */
function browserSize() {
    if (document.body.clientHeight) {
        browserW = document.body.clientWidth;
        browserH = document.body.clientHeight;
    }
    if (document.documentElement.clientHeight) {
        browserW = document.documentElement.clientWidth;
        browserH = document.documentElement.clientHeight;
    }
    if (window.innerHeight) {
        browserW = window.innerWidth;
        browserH = window.innerHeight;
    }
    
    screenW = screen.width;
    screenH = screen.height;
}

window.onload = browserSize;