function group()
  {
    document.getElementById("Group").style.display="block";
    document.getElementById("Message").style.display="none";
    document.getElementById("File").style.display="none";
  }
  function file()
  {
    document.getElementById("Group").style.display="none";
    document.getElementById("Message").style.display="none";
    document.getElementById("File").style.display="block";
  }

function printPartOfPage(elementId)
{
 var printContent = document.getElementById(elementId);
 var windowUrl = 'about:blank';
 var uniqueName = new Date();
 var windowName = 'Print' + uniqueName.getTime();
 var printWindow = window.open(windowUrl, windowName, 'left=50000,top=50000,width=0,height=0');

 printWindow.document.write(printContent.innerHTML);
 printWindow.document.close();
 printWindow.focus();
 printWindow.print();
 printWindow.close();
}