Print LinkButton in asp.net

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ASP.NET

<asp:LinkButton ID="lbnPrint" runat="server" class="msLinkButton" OnClientClick="CallPrint();"
                                TabIndex="9" Text="Print"></asp:LinkButton>

function CallPrint()
{
      var lbnCreatereport = document.getElementById('ctl00_ContentPlaceHolder_lbnCreatereport');
      if (lbnCreatereport != null)
      {
           lbnCreatereport.style.display = 'none';
      } 
     var lbnSave = document.getElementById('ctl00_ContentPlaceHolder_lbnsave');

      if (lbnSave != null)
      {
       lbnSave.style.display = 'none';
      }
     var lbnCancel = document.getElementById('ctl00_ContentPlaceHolder_lbncancel');

     if (lbnCancel != null)
     {
       lbnCancel.style.display = 'none';
     }

     var lbnSubmit = document.getElementById('ctl00_ContentPlaceHolder_lbnsubmit');

     if (lbnSubmit != null)
     {
        lbnSubmit.style.display = 'none';
     }
     var lbnPrint = document.getElementById('ctl00_ContentPlaceHolder_lbnprint');

     if (lbnPrint != null)
     {
        lbnPrint.style.display = 'none';
     }
     var txtSDName = document.getElementById('ctl00_ContentPlaceHolder_txtSDName');

     if (txtSDName != null)
     {
        txtSDName.style.border = 'none';
        txtSDName.disabled=false ;
        txtSDName .readOnly=true;

     }
             var display_setting = "'', '', 'left=0,top=0,width=800,height=600,toolbar=0,scrollbars=1,status=0,resizable'";
            var content_innerhtml = document.getElementById("printme").innerHTML;
            var document_print = window.open("", "", display_setting);
            document_print.document.open();
            document_print.document.write(content_innerhtml);
            document_print.document.write('</body></html>');
            document_print.print();
            document_print.document.close();
            return false;
    }

Hi, I tried on print linkbutton, I wrote the code using javascript for Print LinkButton. When clicking on the Print Linkbutton it's open the new window , The problem here is after opening the new window , the Main page is refreshing and lose data in main page,and also in new window open a message box , in that Print and cancel Buttons . when click on the cancel button and it refreshing the main page also.
I think , we wrote the javascript for print popup, why refreshing the main page when opening the new window and cancel button in new window.

Please any one help me