JS獲取窗口寬度高度

function getWindowDimensions() {
    var winWidth = 0;
    var winHeight = 0;
    //獲取窗口寬度
    if (window.innerWidth) {
        winWidth = window.innerWidth;
    }
    else if ((document.body) && (document.body.clientWidth)) {
        winWidth = document.body.clientWidth;
    }
    //獲取窗口高度
    if (window.innerHeight) {
        winHeight = window.innerHeight;
    }
    else if ((document.body) && (document.body.clientHeight)) {
        winHeight = document.body.clientHeight;
    }
    //通過深入Document內部對body進行檢測，獲取窗口大小
    if (document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth) {
        winHeight = document.documentElement.clientHeight;
        winWidth = document.documentElement.clientWidth;
    }
    var sizeObj = new Object();
    sizeObj.width = winWidth;
    sizeObj.height = winHeight;
    return sizeObj;
}

function toResetWinSize() {
    var winSize = getWindowDimensions();
    var footerPanelHeight = $("#panelFooter").height();
    var rightPanelHeight = $("#panelRight").height();
    var leftPanelHeight = 0;
    var minLeftPanelHeight = $("#leftMenuContainer").height() + 60;
    leftPanelHeight = rightPanelHeight > winSize.height - footerPanelHeight ? rightPanelHeight : winSize.height - footerPanelHeight;
    leftPanelHeight = leftPanelHeight < minLeftPanelHeight ? minLeftPanelHeight : leftPanelHeight;
    $("#panelLeft").css({ "height": leftPanelHeight });
    $("#panelRight").css({ "width": winSize.width - 250 - 24 });
}
$(document).ready(function () {
    toResetWinSize();
    window.setInterval(toResetWinSize, 1000);
});

$(window).resize(function () {
    toResetWinSize();
});