สอบถาม Code หรือ script การดึงรายชื่อเครื่องพิมพ์ ฝั่ง client ASP.net

 <input id="btnPrint" type="button" value="Print" onclick="Print()" class="btn btn-info btn-block" />  

 <div id="dvReport">  
                <CR:CrystalReportViewer ID="CrystalReportViewer1" runat="server"
                AutoDataBind="true" ToolPanelView="None" HasPrintButton="False" />
   </div>

<script type="text/javascript">  
    function Print() {  
        var dvReport = document.getElementById("dvReport");  
        var frame1 = dvReport.getElementsByTagName("iframe")[0];  
        if (navigator.appName.indexOf("Internet Explorer") != -1 || navigator.appVersion.indexOf("Trident") != -1) {  
            frame1.name = frame1.id;  
            window.frames[frame1.id].focus();  
            window.frames[frame1.id].print();  
        } else {  
            var frameDoc = frame1.contentWindow ? frame1.contentWindow : frame1.contentDocument.document ? frame1.contentDocument.document : frame1.contentDocument;  
            frameDoc.print();  
        }  
    }  
</script>