js里获取html真实舞台宽高

    var winSize = {document.documentElement.clientWidth,height:document.documentElement.clientHeight};

 var winWidth = 0;
 var winHeight = 0;

    window.onload = function(){
        console.log("onload...");

        winWidth = document.documentElement.clientWidth;
        winHeight = document.documentElement.clientHeight;

    }