jQuery 获取屏幕高度、宽度

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做手机Web开发做浏览器兼容用到了，所以在网上找了些汇总下。   alert($(window).height()); //浏览器当前窗口可视区域高度 alert($(document).height()); //浏览器当前窗口文档的高度 alert($(document.body).height());//浏览器当前窗口文档body的高度 alert($(document.body).outerHeight(true));//浏览器当前窗口文档body的总高度 包括border padding margin alert($(window).width()); //浏览器当前窗口可视区域宽度 alert($(document).width());//浏览器当前窗口文档对象宽度 alert($(document.body).width());//浏览器当前窗口文档body的高度 alert($(document.body).outerWidth(true));//浏览器当前窗口文档body的总宽度 包括border padding margin    // 获取页面的高度、宽度 function getPageSize() {     var xScroll, yScroll;     if (window.innerHeight && window.scrollMaxY) {         xScroll = window.innerWidth + window.scrollMaxX;         yScroll = window.innerHeight + window.scrollMaxY;     } else {         if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac                xScroll = document.body.scrollWidth;             yScroll = document.body.scrollHeight;         } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari                xScroll = document.body.offsetWidth;             yScroll = document.body.offsetHeight;         }     }     var windowWidth, windowHeight;     if (self.innerHeight) { // all except Explorer            if (document.documentElement.clientWidth) {             windowWidth = document.documentElement.clientWidth;         } else {             windowWidth = self.innerWidth;         }         windowHeight = self.innerHeight;     } else {         if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode                windowWidth = document.documentElement.clientWidth;             windowHeight = document.documentElement.clientHeight;         } else {             if (document.body) { // other Explorers                    windowWidth = document.body.clientWidth;                 windowHeight = document.body.clientHeight;             }         }     }           // for small pages with total height less then height of the viewport        if (yScroll < windowHeight) {         pageHeight = windowHeight;     } else {         pageHeight = yScroll;     }        // for small pages with total width less then width of the viewport        if (xScroll < windowWidth) {         pageWidth = xScroll;     } else {         pageWidth = windowWidth;     }     arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);     return arrayPageSize; }    // 滚动条 document.body.scrollTop; $(document).scrollTop();