js获取页面宽高及浏览器宽高

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//返回页面的高度

   function pageHeight() {

       if (window.innerHeight && window.scrollMaxY) { yScroll = window.innerHeight + window.scrollMaxY; } else if (document.body.scrollHeight > document.body.offsetHeight) { yScroll = document.body.scrollHeight; } else { yScroll = document.body.offsetHeight; }

       return yScroll;

   }

 

   //返回页面的宽度

   function pageWidth() {

       if (window.innerWidth && window.scrollMaxX) { xScroll = window.innerWidth + window.scrollMaxX; } else if (document.body.scrollWidth > document.body.offsetWidth) { xScroll = document.body.scrollWidth; } else { xScroll = document.body.offsetWidth; }

       return xScroll;

   }

 

   //返回浏览器的高度

   function windowHeight() {

       return (window.innerHeight) ? window.innerHeight : (document.documentElement && document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.body.offsetHeight;

   }

 

   //返回浏览器的宽度

   function windowWidth() {

       return (window.innerWidth) ? window.innerWidth : (document.documentElement && document.documentElement.clientWidth) ? document.documentElement.clientWidth : document.body.offsetWidth;

   }