在屏幕坐标下获取窗口视口左上角的Y坐标
nsIDOMWindowUtils.screenPixelsPerCSSPixel 属性screenY = window.mozInnerScreenY;
window.mozInnerScreenY 的属性值.window.mozInnerScreenY的属性值是一个浮点数，只读;它没有默认值.不属于任何W3C规范或标准
WindowapplicationCachecachesclosedconsolecontrollerscryptodefaultStatus [我来译!]devicePixelRatiodialogArgumentsdirectories [我来译!]documentframeElementframesfullScreenhistoryindexedDBinnerHeightinnerWidthisSecureContext [我来译!]isSecureContext [我来译!]lengthlocalStoragelocationlocationbar [我来译!]menubar [我来译!]messageManagermozAnimationStartTimemozInnerScreenX [我来译!]mozInnerScreenYmozPaintCountnamenavigatoronabortonafterprint [我来译!]onanimationcancelonanimationendonanimationiteration [我来译!]onappinstalled [我来译!]onauxclick [我来译!]onbeforeinstallpromptonbeforeprintonbeforeunloadonbluronchangeonclickoncloseoncontextmenuondblclickondevicelight [我来译!]ondevicemotion [我来译!]ondeviceorientation [我来译!]ondeviceorientationabsolute [我来译!]ondeviceproximity [我来译!]ondragdrop [我来译!])window.location='https://developer.mozilla.org/zh-CN/docs/Web/API/GlobalEventHandlers/Abbr.gif'){kind=link}
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