ie中自动识别单屏与双屏(js)

<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Line</title>
    
    <script type="text/javascript">
        window.onload = function () {
            document.getElementById("btnZX").onclick = function () {
                var locator = new ActiveXObject("WbemScripting.SWbemLocator");
                var service = locator.ConnectServer(".");
 
                //显示器
                var xsq = new Enumerator(service.ExecQuery("select * from Win32_DesktopMonitor"));
 
                //得到所有显示器的分辨率
                //如果有2个显示器，则有2对分辨率；反之，则为1个显示器
                var xsq1Width;
                var xsq1Height;
                var xsq2Width;
                var xsq2Height;
                var i = 1;
 
                for (; !xsq.atEnd() ; xsq.moveNext()) {
                    if (i == 1) {
                        xsq1Width = xsq.item().ScreenWidth;
                        xsq1Height = xsq.item().ScreenHeight;
                    } else if (i == 2) {
                        xsq2Width = xsq.item().ScreenWidth;
                        xsq2Height = xsq.item().ScreenHeight;
                    }
                    i++;
                }
 
 
                //判断单双屏
                if ((xsq1Width == null && xsq1Height == null) || (xsq2Width == null && xsq2Height == null)) {
                    window.open("", "", "top=0,left=0,alwaysRaised=no,fullscreen=yes");
                }
                else {
                    //显示器1是主屏
                    if (window.screen.width == xsq1Width && window.screen.height == xsq1Height) {
                        if (window.screenLeft >= 0 && window.screenLeft < xsq1Width) {
                            window.open("", "", "top=0,left=" + xsq1Width + ",width=" + (xsq2Width - 20) + ",height=" + xsq2Height + "");
                        }
                        if (window.screenLeft >= xsq1Width && window.screenLeft < (xsq1Width + xsq2Width)) {
                            //从右向左跳
                            window.open("", "", "top=0,left=0,width=" + (xsq1Width - 20) + ",height=" + xsq1Height + "");
                        }
                    }
 
 
                    //显示器2是主屏 
                    if (window.screen.width == xsq2Width && window.screen.height == xsq2Height) {
                        //alert("显示器2是主屏");
 
                        if (window.screenLeft >= 0 && window.screenLeft < xsq2Width) {
                             
                            window.open("", "", "top=0,left=0,width=" + (xsq1Width - 20) + ",height=" + xsq1Height + "");
                        }
                        if (window.screenLeft >= (-xsq1Width) && window.screenLeft < 0) {
                            //从左向右跳
                            
                            var objWin = window.open("", "", "top=0,left=0,width=" + (xsq2Width - 20) + ",height=" + xsq2Height + "");
                        }
                    }
                }
 
            }
 
        }
        
    </script>
 
</head>
<body>
    <div>
        <button type="button" id="btnZX">专线</button>
    </div>
</body>
</html>